NFPA RATING
FLAMMABILITY
0
0
1
HEALTH INSTABILITY
OTHER
MATERIAL SAFETY DATA SHEET
Prepared to U.S. OSHA, CMA, ANSI and Canadian WHMIS Standards
PART I What is the material and what do I need to know in an emergency?
1. PRODUCT IDENTIFICATION
CHEMICAL NAME; CLASS: SULFUR HEXAFLUORIDE - SF6
Document Number: 001048
PRODUCT USE: For General Analytical Chemical Uses
SUPPLIER/MANUFACTURER'S NAME: AIRGAS INC.
ADDRESS: 259 N. Radnor-Chester Road
Suite 100
Radnor, PA 19087-5283
BUSINESS PHONE: 1-610-687-5253
EMERGENCY PHONE: 1-800-949-7937
International: 423-479-0293
DATE OF PREPARATION: May 20, 1996
DATE OF REVISION: March 26, 2004
2. COMPOSITION and INFORMATION ON INGREDIENTS
CHEMICAL NAME CAS # mole % EXPOSURE LIMITS IN AIR
ACGIH-TLV OSHA-PEL NIOSH OTHER
TWA STEL TWA STEL IDLH
ppm ppm ppm ppm ppm ppm
Sulfur Hexafluoride 2551-62-4 > 99.8% 1000 NE 1000 NE NE NIOSH REL:
TWA = 1000
DFG MAK:
TWA = 1000
PEAK = 8•MAK 15 min.
average value, 1-hr interval
Maximum Impurities < 0.2% None of the trace impurities in this mixture contribute significantly to the hazards associated
with the product. All hazard information pertinent to this product has been provided in this
Material Safety Data Sheet, per the requirements of the OSHA Hazard Communication
Standard (29 CFR 1910.1200) and State equivalent standards.
NE = Not Established. See Section 16 for Definitions of Terms Used.
NOTE (1): ALL WHMIS required information is included in appropriate sections based on the ANSI Z400.1-1998 format. This gas mixture has
been classified in accordance with the hazard criteria of the CPR and the MSDS contains all the information required by the CPR.
3. HAZARD IDENTIFICATION
EMERGENCY OVERVIEW: Sulfur Hexafluoride is a colorless, odorless, non-toxic, non-flammable gas which is
shipped as a liquefied gas. The liquefied gas will rapidly boil at standard temperatures and pressures. The main
health hazard associated with releases of this gas is asphyxiation, by displacement of oxygen. Sulfur Hexafluoride
can decompose at very high temperatures or when subjected to an electric discharge forming highly toxic
decomposition products, including sulfur tetrafluoride and hydrogen fluoride. Contact with the liquefied gas can
cause frostbite to any contaminated tissue. Sulfur Hexafluoride is not flammable or reactive under typical
emergency response situations.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 1 OF 9
3. HAZARD IDENTIFICATION (Continued)
SYMPTOMS OF OVEREXPOSURE BY ROUTE OF EXPOSURE:
HAZARDOUS MATERIAL IDENTIFICATION SYSTEM
The most significant route of overexposure for this gas is by
inhalation. The following paragraphs describe symptoms of
exposure by route of exposure.
HEALTH HAZARD 1
(BLUE)
INHALATION: High concentrations of this gas can cause an
oxygen-deficient environment. Individuals breathing such an
atmosphere may experience symptoms which include headaches,
ringing in ears, dizziness, drowsiness, unconsciousness, nausea,
FLAMMABILITY HAZARD (RED) 0
vomiting, and depression of all the senses. The skin of a victim of
overexposure may have a blue color. Under some circumstances
of overexposure, death may occur. The effects associated with
various levels of oxygen are as follows:
PHYSICAL HAZARD
CONCENTRATION SYMPTOMS OF EXPOSURE (YELLOW) 0
12-16% Oxygen: Breathing and pulse rate increased,
muscular coordination slightly disturbed.
10-14% Oxygen: Emotional upset, abnormal fatigue,
PROTECTIVE EQUIPMENT
disturbed respiration.
6-10% Oxygen: Nausea and vomiting, collapse or loss of
consciousness. EYES HANDS BODY
RESPIRATORY
Below 6%: Convulsive movements, possible
See See
respiratory collapse, and death.
OTHER POTENTIAL HEALTH EFFECTS: If Sulfur Hexafluoride Section 8 Section 8
is subjected to electrical discharge, highly toxic decomposition
For Routine Industrial Use and Handling Applications
products are formed which may include sulfur tetrafluoride and
other sulfur fluorides, sulfuryl fluoride, thionyl fluorides, sulfur
oxides, hydrogen sulfide and/or hydrogen fluoride. Exposure to See Section 16 for Definition of Ratings
these decomposition products may result in pulmonary edema, a
potentially fatal accumulation of fluid in the lungs. Symptoms of
pulmonary edema include shortness of breath, pain in the chest and difficulty breathing. Symptoms may not
develop for up to 24 hours after exposure. Contact with liquid or rapidly expanding gases (which are released
under high pressure) may cause frostbite. Symptoms of frostbite include change in skin color to white or grayish-
yellow. The pain after contact with liquid can quickly subside.
HEALTH EFFECTS OR RISKS FROM EXPOSURE: An Explanation in Lay Terms. Overexposure to Sulfur
Hexafluoride may cause the following health effects:
ACUTE: The most significant hazard associated with this gas is inhalation of oxygen-deficient atmospheres.
Symptoms of oxygen deficiency include respiratory difficulty, ringing in ears, headache, dizziness, indigestion,
nausea, and possible death. Contact with liquid or rapidly expanding gases (which are released under high
pressure) may cause frostbite.
CHRONIC: There are currently no known adverse health effects associated with chronic exposure to this gas.
TARGET ORGANS: ACUTE: Respiratory system. CHRONIC: None known.
PART II What should I do if a hazardous situation occurs?
4. FIRST-AID MEASURES
RESCUERS SHOULD NOT ATTEMPT TO RETRIEVE VICTIMS OF EXPOSURE TO SULFUR HEXAFLUORIDE
WITHOUT ADEQUATE PERSONAL PROTECTIVE EQUIPMENT. At a minimum, Self-Contained Breathing
Apparatus Personal Protective equipment should be worn.
Remove victim(s) to a safe location. Trained personnel should administer supplemental oxygen and/or cardio-
pulmonary resuscitation, if necessary. Only trained personnel should administer supplemental oxygen. Victim(s)
must be taken for medical attention. Rescuers should be taken for medical attention, if necessary. Take copy of
label and MSDS to physician or other health professional with victim(s).
In case of frostbite, place the frostbitten part in warm water. DO NOT USE HOT WATER. If warm water is not
available, or is impractical to use, wrap the affected parts gently in blankets. Alternatively, if the fingers or hands are
frostbitten, place the affected area of the body in the armpit. Encourage victim to gently exercise the affected part
while being warmed. Seek immediate medical attention.
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: Pre-existing respiratory conditions may be aggravated
by overexposure to Sulfur Hexafluoride.
RECOMMENDATIONS TO PHYSICIANS: Treat symptoms and reduce overexposure.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 2 OF 9
5. FIRE-FIGHTING MEASURES
FLASH POINT: Not applicable.
AUTOIGNITION TEMPERATURE: Not applicable. NFPA RATING
FLAMMABLE LIMITS (in air by volume, %): FLAMMABILITY
Lower (LEL): Not applicable.
Upper (UEL): Not applicable. 0
FIRE EXTINGUISHING MATERIALS: Non-flammable, inert gas. Use
extinguishing media appropriate for surrounding fire. 0
1
HEALTH INSTABILITY
UNUSUAL FIRE AND EXPLOSION HAZARDS: Although Sulfur
Hexafluoride is a non-flammable gas, it can present minor health hazards
to firefighters. Sulfur Hexafluoride does not burn; however, containers,
when involved in fire, may rupture or burst in the heat of the fire. Products OTHER
of thermal decomposition of Sulfur Hexafluoride includes toxic gases
(e.g., sulfuryl and thionyl fluorides).
See Section 16 for
Explosion Sensitivity to Mechanical Impact: Not sensitive.
Definition of Ratings
Explosion Sensitivity to Static Discharge: Not sensitive.
SPECIAL FIRE-FIGHTING PROCEDURES: Structural firefighters must wear Self-Contained Breathing Apparatus
and full protective equipment. In the event of fire, cool containers of Sulfur Hexafluoride with water to prevent failure.
Use a water spray or fog to reduce or direct vapors. If cylinders are exposed to heat, the cylinder may rupture or
burst and release the contents. It may be prudent to remove potentially heat-exposed cylinders from the area
surrounding a fire, if it is safe for fire-fighters to do so.
6. ACCIDENTAL RELEASE MEASURES
SPILL AND LEAK RESPONSE: Uncontrolled releases should be responded to by trained personnel using
pre-planned procedures. Proper protective equipment should be used. In case of a release, clear the affected area,
protect people, and respond with trained personnel. Minimum Personal Protective Equipment should be Level B:
protective clothing, mechanically-resistant gloves and Self-Contained Breathing Apparatus. Locate and seal
the source of the leaking gas. Allow the gas to dissipate. Monitor the surrounding area for Sulfur Hexafluoride and
oxygen levels. Sulfur Hexafluoride must be below the levels indicated in Section 2 (Composition and Information on
Ingredients). The atmosphere must have at least 19.5 percent oxygen before personnel can be allowed in the area
without Self-Contained Breathing Apparatus. Attempt to close the main source valve prior to entering the area. If
this does not stop the release (or if it is not possible to reach the valve), allow the gas to release in-place or remove it
to a safe area and allow the gas to be released there.
PART III How can I prevent hazardous situations from occurring?
7. HANDLING and STORAGE
WORK PRACTICES AND HYGIENE PRACTICES: As with all chemicals, avoid getting Sulfur Hexafluoride IN YOU.
Do not eat or drink while handling chemicals. Be aware of any signs of dizziness or fatigue; exposures to fatal
concentrations of Sulfur Hexafluoride could occur without any significant warning symptoms.
STORAGE AND HANDLING PRACTICES: Sulfur Hexafluoride should be stored in dry, well-ventilated areas
separate from incompatibles, such as strong oxidizing agents, and away from sources of heat. Compressed gases
can present significant safety hazards. Store containers away from heavily trafficked areas and emergency exits.
Post “No Smoking or Open Flames� signs in storage or use areas. Since Sulfur Hexafluoride is non-corrosive, any
of the common structural metals may be used under ordinary conditions.
SPECIAL PRECAUTIONS FOR HANDLING GAS CYLINDERS: Protect cylinders against physical damage. Store
in cool, dry, well-ventilated fireproof area, away from flammable materials and corrosive atmospheres. Store away
from heat and ignition sources and out of direct sunlight. Do not store near elevators, corridors or loading docks. Do
not allow area where cylinders are stored to exceed 52°C (125°F). Use only storage containers and equipment
(pipes, valves, fittings to relieve pressure, etc.) designed for the storage of Liquid Sulfur Hexafluoride. Do not store
containers where they can come into contact with moisture. Cylinders should be stored upright and be firmly
secured to prevent falling or being knocked over. Cylinders can be stored in the open, but in such cases, should be
protected against extremes of weather and from the dampness of the ground to prevent rusting. Never tamper with
pressure relief devices. The following rules are applicable to situations in which cylinders are being used:
Before Use: Move cylinders with a suitable hand-truck. Do not drag, slide or roll cylinders. Do not drop cylinders or
permit them to strike each other. Secure cylinders firmly. Leave the valve protection cap, if provided, in-place until
cylinder is ready for use.
During Use: Use designated CGA fittings and other support equipment. Do not use adapters. Do not heat cylinder
by any means to increase the discharge rate of the product from the cylinder. Use check valve or trap in discharge
line to prevent hazardous backflow into the cylinder. Do not use oils or grease on gas-handling fittings or equipment.
After Use: Close main cylinder valve. Replace valve protection cap, if provided. Mark empty cylinders “EMPTY�.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 3 OF 9
7. HANDLING and STORAGE (Continued)
NOTE: Use only DOT or ASME code containers. Close valve after each use and when empty. Cylinders must not
be recharged except by or with the consent of owner. For additional information refer to the Compressed Gas
Association Pamphlet P-1, Safe Handling of Compressed Gases in Containers. Additionally, refer to CGA Bulletin
SB-2 “Oxygen Deficient Atmospheres�.
PROTECTIVE PRACTICES DURING MAINTENANCE OF CONTAMINATED EQUIPMENT: Follow practices
indicated in Section 6 (Accidental Release Measures). Make certain application equipment is locked and tagged-out
safely. Purge gas handling equipment with inert gas (e.g., Nitrogen) before attempting repairs.
8. EXPOSURE CONTROLS - PERSONAL PROTECTION
VENTILATION AND ENGINEERING CONTROLS: Use with adequate ventilation. Local exhaust ventilation is
preferred, because it prevents Sulfur Hexafluoride dispersion into the work place by eliminating it at its source. If
appropriate, install automatic monitoring equipment to detect the level of Sulfur Hexafluoride and oxygen.
RESPIRATORY PROTECTION: Maintain Sulfur Hexafluoride levels below those indicated in Section 2
(Composition and Information on Ingredients) and oxygen levels above 19.5% in the workplace. If respiratory
protection is needed, use only protection authorized in the U.S. Federal OSHA Standard (29 CFR 1910.134),
applicable U.S. State regulations, or the Canadian CSA Standard Z94.4-93 and applicable standards of Canadian
Provinces. Oxygen levels below 19.5% are considered IDLH by OSHA. In such atmospheres, use of a full-
facepiece pressure/demand SCBA or a full facepiece, supplied air respirator with auxiliary self-contained air supply is
required under OSHA’s Respiratory Protection Standard (1910.134-1998).
EYE PROTECTION: Splash goggles, face-shields or safety glasses. If necessary, refer to U.S. OSHA 29 CFR
1910.133, or Canadian Standards.
HAND PROTECTION: Wear mechanically-resistant gloves when handling cylinders of Sulfur Hexafluoride. If
necessary, refer to U.S. OSHA 29 CFR 1910.138 or appropriate Standards of Canada.
BODY PROTECTION: Use body protection appropriate for task. Transfer of large quantities under pressure may
require protective equipment appropriate to protect employees from splashes of liquefied product, as well provide
sufficient insulation from cold. If a hazard of injury to the feet exists due to falling objects, rolling objects, where
objects may pierce the soles of the feet or where employee’s feet may be exposed to electrical hazards, use foot
protection, as described in U.S. OSHA 29 CFR.
9. PHYSICAL and CHEMICAL PROPERTIES
VAPOR DENSITY: 6.162 kg/m3 (0.38 lb/ft3) EVAPORATION RATE (nBuAc = 1): Not applicable.
SPECIFIC GRAVITY (air = 1): 5.114 MELTING POINT: -50.8°C (-59.4°F)
SOLUBILITY IN WATER, v/v @ 20 °C: 0.001% BOILING POINT: (Sublimation Point) -63.7°C (-82.7°F)
VAPOR PRESSURE (psig): 320 pH: Not applicable.
EXPANSION RATIO: Not applicable. ODOR THRESHOLD: Not applicable. Odorless.
COEFFICIENT WATER/OIL DISTRIBUTION: Not applicable. SPECIFIC VOLUME (ft3/lb): 2.5
APPEARANCE AND COLOR: Sulfur Hexafluoride is a colorless, odorless gas.
HOW TO DETECT THIS SUBSTANCE (warning properties): There are no unusual warning properties associated
with a release of Sulfur Hexafluoride. In terms of leak detection, fittings and joints can be painted with a soap
solution to detect leaks, which will be indicated by a bubble formation.
10. STABILITY and REACTIVITY
STABILITY: Normally stable, inert gas.
DECOMPOSITION PRODUCTS: Sulfur fluorides and hydrogen fluoride. Sulfur Hexafluoride may be partially
decomposed if subjected to static discharge. Sulfur Hexafluoride is not corrosive to most metals under normal
conditions. Some of the breakdown products are corrosive and will be enhanced by the presence of moisture or at
high temperatures. Sulfur Hexafluoride also decomposes slightly in the presence of certain metals at temperatures
in excess of 204°C (400°F), this effect being most pronounced with silicon and carbon steels. Sulfur Hexafluoride is
non-reactive with most chemicals. Sulfur Hexafluoride, however, can react violently with disilane. Sulfur
Hexafluoride is only stable at elevated temperatures [e.g., 204°C (> 400°F)] when contained in aluminum, stainless
steel, copper, brass, or silver. Other metals can cause slow decomposition to sulfur-fluoride compounds. If this
decomposition occurs in the presence of oxygen, thionyl fluoride compounds can be generated.
HAZARDOUS POLYMERIZATION: Will not occur.
CONDITIONS TO AVOID: Contact with incompatible materials. Cylinders exposed to high temperatures or direct
flame can rupture or burst.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 4 OF 9
PART IV Is there any other useful information about this material?
11. TOXICOLOGICAL INFORMATION
TOXICITY DATA: The following data are for Sulfur Hexafluoride:
LD50 (Intravenous-Rabbit) 5790 mg/kg
LCLo (Inhalation-Mammal-Species Unspecified) 300 gm/m3: Peripheral Nerve and Sensation: flaccid paralysis with appropriate anesthesia;
Behavioral: muscle weakness, rigidity (including catalepsy)
Male rats were exposed for periods of 16-24 hours to 20% oxygen and 80% Sulfur Hexafluoride at 1 atmosphere ambient pressure showed no
changes.
SUSPECTED CANCER AGENT: Sulfur Hexafluoride is not found on the following lists: FEDERAL OSHA Z LIST,
NTP, CAL/OSHA, IARC; therefore it is not considered to be, nor suspected to be a cancer-causing agent by these
agencies.
IRRITANCY OF PRODUCT: Contact with rapidly expanding gases can cause frostbite and damage to exposed skin
and eyes.
SENSITIZATION OF PRODUCT: Sulfur Hexafluoride is not known to be a human skin or respiratory sensitizer.
REPRODUCTIVE TOXICITY INFORMATION: Listed below is information concerning the effects of Sulfur
Hexafluoride on the human reproductive system.
Mutagenicity: Sulfur Hexafluoride is not reported to cause mutagenic effects in humans.
Embryotoxicity: Sulfur Hexafluoride is not reported to cause embryotoxic effects in humans.
Teratogenicity: Sulfur Hexafluoride is not reported to cause teratogenic effects in humans.
Reproductive Toxicity: Sulfur Hexafluoride is not reported to cause adverse reproductive effects in humans.
A mutagen is a chemical which causes permanent changes to genetic material (DNA) such that the changes will
propagate through generation lines. An embryotoxin is a chemical which causes damage to a developing embryo
(i.e. within the first eight weeks of pregnancy in humans), but the damage does not propagate across generational
lines. A teratogen is a chemical which causes damage to a developing fetus, but the damage does not propagate
across generational lines. A reproductive toxin is any substance which interferes in any way with the reproductive
process.
BIOLOGICAL EXPOSURE INDICES (BEIs): Currently, Biological Exposure Indices (BEIs) are not applicable for
Sulfur Hexafluoride.
12. ECOLOGICAL INFORMATION
ENVIRONMENTAL STABILITY: The gas will be dissipated rapidly in well-ventilated areas.
EFFECT OF MATERIAL ON PLANTS or ANIMALS: Any adverse effect on animals would be related to oxygen
deficient environments. No adverse effect is anticipated to occur to plant-life, except for frost produced in the
presence of rapidly expanding gases.
EFFECT OF CHEMICAL ON AQUATIC LIFE: No data are currently available on the effects of Sulfur Hexafluoride
on aquatic life.
13. DISPOSAL CONSIDERATIONS
PREPARING WASTES FOR DISPOSAL: Product removed from the cylinder must be disposed of in accordance
with appropriate U.S. Federal, State, and local regulations or with regulations of Canada and its Provinces. Return
cylinders with residual product to Airgas, Inc. Do not dispose of locally.
14. TRANSPORTATION INFORMATION
THIS GAS IS HAZARDOUS AS DEFINED BY 49 CFR 172.101 BY THE U.S. DEPARTMENT OF
TRANSPORTATION.
PROPER SHIPPING NAME: Sulfur hexafluoride
HAZARD CLASS NUMBER and DESCRIPTION: 2.2 (Non-Flammable Gas)
UN IDENTIFICATION NUMBER: UN 1080
PACKING GROUP: Not Applicable
DOT LABEL(S) REQUIRED: Class 2.2 (Non-Flammable Gas)
NORTH AMERICAN EMERGENCY RESPONSE GUIDEBOOK NUMBER (1996): 126
MARINE POLLUTANT: Sulfur Hexafluoride is not classified by the DOT as a Marine Pollutant (as defined by 49
CFR 172.101, Appendix B).
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 5 OF 9
14. TRANSPORTATION INFORMATION (Continued)
TRANSPORT CANADA TRANSPORTATION OF DANGEROUS GOODS REGULATIONS: This gas is considered
as Dangerous Goods, per regulations of Transport Canada. The use of the above U.S. DOT information from the
U.S. 49 CFR regulations is allowed for shipments that originate in the U.S. For shipments via ground vehicle or rail
that originate in Canada, the following information is applicable.
PROPER SHIPPING NAME: Sulfur hexafluoride
HAZARD CLASS NUMBER and DESCRIPTION: Class 2.2 (Non-Flammable Gas)
UN IDENTIFICATION NUMBER: UN 1080
PACKING GROUP: Not Applicable
HAZARD LABEL(S) REQUIRED: Class 2.2 (Non-Flammable Gas)
SPECIAL PROVISIONS: None
EXPLOSIVE LIMIT & LIMITED QUANTITY INDEX: 42
ERAP INDEX: 0.12
PASSENGER CARRYING SHIP INDEX: None
PASSENGER CARRYING ROAD OR RAIL VEHICLE INDEX: 75
MARINE POLLUTANT: Air is not a Marine Pollutant.
15. REGULATORY INFORMATION
ADDITIONAL U.S. REGULATIONS:
U.S. SARA REPORTING REQUIREMENTS: Sulfur Hexafluoride is not subject to the reporting requirements of
Sections 302, 304 and 313 of Title III of the Superfund Amendments and Reauthorization Act.
U.S. SARA THRESHOLD PLANNING QUANTITY: There are no specific Threshold Planning Quantities for this gas.
The default Federal MSDS submission and inventory requirement filing threshold of 10,000 lb (4,540 kg) may apply,
per 40 CFR 370.20.
U.S. CERCLA REPORTABLE QUANTITIES (RQ): Not applicable.
U.S. TSCA INVENTORY STATUS: Sulfur Hexafluoride is listed on the TSCA Inventory.
OTHER U.S. FEDERAL REGULATIONS: Not applicable.
CALIFORNIA SAFE DRINKING WATER AND TOXIC ENFORCEMENT ACT (PROPOSITION 65): Sulfur
Hexafluoride is not on the California Proposition 65 lists.
CGA LABELING (For Compressed Gas):
CAUTION: LIQUID AND GAS UNDER PRESSURE.
CAN CAUSE RAPID SUFFOCATION.
MAY CAUSE FROSTBITE.
Store and use with adequate ventilation.
Do not get liquid in eyes, on skin or clothing.
Cylinder temperature should not exceed 52°C (125°F).
Close valve after each use and when empty.
Use in accordance with the Material Safety Data Sheet.
FIRST-AID: IF INHALED, remove to fresh air. If not breathing, give artificial respiration. If breathing is
difficult, give oxygen. Call a physician.
IN CASE OF FROSTBITE, obtain immediate medial attention.
DO NOT REMOVE THIS PRODUCT LABEL.
ADDITIONAL CANADIAN REGULATIONS:
CANADIAN DSL/NDSL INVENTORY STATUS: Sulfur Hexafluoride is on the DSL Inventory.
CANADIAN ENVIRONMENTAL PROTECTION ACT (CEPA) PRIORITIES SUBSTANCES LISTS: Sulfur
Hexafluoride is not on the CEPA Priorities Substances Lists.
CANADIAN WHMIS CLASSIFICATION AND SYMBOLS: Class A: Compressed Gases
16. OTHER INFORMATION
PREPARED BY: CHEMICAL SAFETY ASSOCIATES, Inc.
PO Box 3519, La Mesa, CA 91944-3519
619/670-0609
The information contained herein is based on data considered accurate. However, no warranty is expressed or implied regarding the accuracy of
these data or the results to be obtained from the use thereof. Airgas, Inc. assumes no responsibility for injury to the vendee or third persons
proximately caused by the material if reasonable safety procedures are not adhered to as stipulated in the data sheet. Additionally, Airgas, Inc.
assumes no responsibility for injury to vendee or third persons proximately caused by abnormal use of the material even if reasonable safety
procedures are followed. Furthermore, vendee assumes the risk in his use of the material.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 6 OF 9
DEFINITIONS OF TERMS
A large number of abbreviations and acronyms appear on a MSDS. Some of these which are commonly used include the following:
CAS #: This is the Chemical Abstract Service Number that uniquely HAZARDOUS MATERIALS IDENTIFICATION SYSTEM
identifies each constituent. EXPOSURE LIMITS IN AIR: HAZARD RATINGS (continued):
CEILING LEVEL: The concentration that shall not be exceeded during HEALTH HAZARD (continued):
any part of the working exposure. 3 (continued): PII or Draize > 5-8 with destruction of tissue. Eye
LOQ: Limit of Quantitation. Irritation: Corrosive, irreversible destruction of ocular tissue; corneal
involvement or irritation persisting for more than 21 days. Draize > 80
MAK: Federal Republic of Germany Maximum Concentration Values
with effects irreversible in 21 days. Oral Toxicity LD50 Rat: > 1-50
in the workplace.
mg/kg. Dermal Toxicity LD50Rat or Rabbit: > 20-200 mg/kg. Inhalation
NE: Not Established. When no exposure guidelines are established,
Toxicity LC50 4-hrs Rat: > 0.05-0.5 mg/L.); 4 (Severe Hazard: Life-
an entry of NE is made for reference.
threatening; major or permanent damage may result from single or
NIC: Notice of Intended Change.
repeated exposure. Skin Irritation: Not appropriate. Do not rate as a
NIOSH CEILING: The exposure that shall not be exceeded during any
�4�, based on skin irritation alone. Eye Irritation: Not appropriate. Do
part of the workday. If instantaneous monitoring is not feasible, the
not rate as a �4�, based on eye irritation alone. Oral Toxicity LD50 Rat:
ceiling shall be assumed as a 15-minute TWA exposure (unless
< 1 mg/kg. Dermal Toxicity LD50Rat or Rabbit: < 20 mg/kg. Inhalation
otherwise specified) that shall not be exceeded at any time during a
Toxicity LC50 4-hrs Rat: < 0.05 mg/L).
workday.
FLAMMABILITY HAZARD:
NIOSH RELs: NIOSH’s Recommended Exposure Limits.
0 (Minimal Hazard-Materials that will not burn in air when exposure to a
PEL-Permissible Exposure Limit: OSHA’s Permissible Exposure
temperature of 815.5°C [1500°F] for a period of 5 minutes.); 1 (Slight
Limits. This exposure value means exactly the same as a TLV, except
Hazard-Materials that must be pre-heated before ignition can occur.
that it is enforceable by OSHA. The OSHA Permissible Exposure
Material require considerable pre-heating, under all ambient
Limits are based in the 1989 PELs and the June, 1993 Air
temperature conditions before ignition and combustion can occur,
Contaminants Rule (Federal Register: 58: 35338-35351 and 58:
Including: Materials that will burn in air when exposed to a temperature
40191). Both the current PELs and the vacated PELs are indicated.
The phrase, “Vacated 1989 PEL,� is placed next to the PEL that was of 815.5°C (1500°F) for a period of 5 minutes or less; Liquids, solids
vacated by Court Order. and semisolids having a flash point at or above 93.3°C [200°F] (e.g.
SKIN: Used when a there is a danger of cutaneous absorption. OSHA Class IIIB, or; Most ordinary combustible materials [e.g. wood,
STEL-Short Term Exposure Limit: Short Term Exposure Limit, paper, etc.]; 2 (Moderate Hazard-Materials that must be moderately
usually a 15-minute time-weighted average (TWA) exposure that heated or exposed to relatively high ambient temperatures before
should not be exceeded at any time during a workday, even if the 8-hr ignition can occur. Materials in this degree would not, under normal
TWA is within the TLV-TWA, PEL-TWA or REL-TWA. conditions, form hazardous atmospheres in air, but under high ambient
TLV-Threshold Limit Value: An airborne concentration of a temperatures or moderate heating may release vapor in sufficient
substance that represents conditions under which it is generally quantities to produce hazardous atmospheres in air, Including: Liquids
believed that nearly all workers may be repeatedly exposed without having a flash-point at or above 37.8°C [100°F] Solid materials in the
adverse effect. The duration must be considered, including the 8-hour. form of course dusts that may burn rapidly but that generally do not
TWA-Time Weighted Average: Time Weighted Average exposure form explosive atmospheres; Solid materials in a fibrous or shredded
concentration for a conventional 8-hr (TLV, PEL) or up to a 10-hr (REL) form that may burn rapidly and create flash fire hazards (e.g. cotton,
workday and a 40-hr workweek. sisal, hemp; Solids and semisolids that readily give off flammable
IDLH-Immediately Dangerous to Life and Health: This level vapors.); 3 (Serious Hazard- Liquids and solids that can be ignited
represents a concentration from which one can escape within 30- under almost all ambient temperature conditions. Materials in this
minutes without suffering escape-preventing or permanent injury. degree produce hazardous atmospheres with air under almost all
HAZARDOUS MATERIALS IDENTIFICATION SYSTEM ambient temperatures, or, unaffected by ambient temperature, are
readily ignited under almost all conditions, including: Liquids having a
HAZARD RATINGS: This rating system was developed by the
flash point below 22.8°C [73°F] and having a boiling point at or above
National Paint and Coating Association and has been adopted by
38°C [100°F] and below 37.8°C [100°F] [e.g. OSHA Class IB and IC];
industry to identify the degree of chemical hazards.
Materials that on account of their physical form or environmental
HEALTH HAZARD:
conditions can form explosive mixtures with air and are readily
0 (Minimal Hazard: No significant health risk, irritation of skin or eyes
dispersed in air [e.g., dusts of combustible solids, mists or droplets of
not anticipated. Skin Irritation: Essentially non-irritating. PII or Draize
flammable liquids]; Materials that burn extremely rapidly, usually by
= �0�. Eye Irritation: Essentially non-irritating, or minimal effects which
reason of self-contained oxygen [e.g. dry nitrocellulose and many
clear in < 24 hours [e.g. mechanical irritation]. Draize = �0�. Oral
organic peroxides]); 4 (Severe Hazard-Materials that will rapidly or
Toxicity LD50 Rat: < 5000 mg/kg. Dermal Toxicity LD50Rat or Rabbit: <
completely vaporize at atmospheric pressure and normal ambient
2000 mg/kg. Inhalation Toxicity 4-hrs LC50 Rat: < 20 mg/L.); 1 (Slight
temperature or that are readily dispersed in air, and which will burn
Hazard: Minor reversible Injury may occur; slightly or mildly irritating.
readily, including: Flammable gases; Flammable cryogenic materials;
Skin Irritation: Slightly or mildly irritating. Eye Irritation: Slightly or
Any liquid or gaseous material that is liquid while under pressure and
mildly irritating. Oral Toxicity LD50 Rat: > 500-5000 mg/kg. Dermal
has a flash point below 22.8°C [73°F] and a boiling point below 37.8°C
Toxicity LD50Rat or Rabbit: > 1000-2000 mg/kg. Inhalation Toxicity
LC50 4-hrs Rat: > 2-20 mg/L); 2 (Moderate Hazard: Temporary or [100°F] [e.g. OSHA Class IA; Material that ignite spontaneously when
transitory injury may occur. Skin Irritation: Moderately irritating; primary exposed to air at a temperature of 54.4°C [130°F] or below [e.g.
irritant; sensitizer. PII or Draize > 0, < 5. Eye Irritation: Moderately to pyrophoric]).
severely irritating and/or corrosive; reversible corneal opacity; corneal PHYSICAL HAZARD:
involvement or irritation clearing in 8-21 days. Draize > 0, < 25. Oral 0 (Water Reactivity: Materials that do not react with water. Organic
Toxicity LD50 Rat: > 50-500 mg/kg. Dermal Toxicity LD50Rat or Rabbit: Peroxides: Materials that are normally stable, even under fire
> 200-1000 mg/kg. Inhalation Toxicity LC50 4-hrs Rat: > 0.5-2 mg/L.); conditions and will not react with water. Explosives: Substances that
2 (Moderate Hazard: Temporary or transitory injury may occur. Skin are Non-Explosive. Unstable Compressed Gases: No Rating.
Irritation: Moderately irritating; primary irritant; sensitizer. PII or Draize Pyrophorics: No Rating. Oxidizers: No �0� rating allowed. Unstable
> 0, < 5. ; Eye Irritation: Moderately to severely irritating and/or Reactives: Substances that will not polymerize, decompose, condense
corrosive; reversible corneal opacity; corneal involvement or irritation or self-react.); 1 (Water Reactivity: Materials that change or
clearing in 8-21 days. Draize > 0, < 25. Oral Toxicity LD50 Rat: > 50- decompose upon exposure to moisture. Organic Peroxides: Materials
500 mg/kg. Dermal Toxicity LD50Rat or Rabbit: > 200-1000 mg/kg. that are normally stable, but can become unstable at high temperatures
Inhalation Toxicity LC50 4-hrs Rat: > 0.5-2 mg/L. 3 (Serious Hazard): and pressures. These materials may react with water, but will not
Major injury likely unless prompt action is taken and medical treatment release energy. Explosives: Division 1.5 & 1.6 substances that are
is given; high level of toxicity; corrosive. Skin Irritation: Severely very insensitive explosives or that do not have a mass explosion
irritating and/or corrosive; may destroy dermal tissue, cause skin burns, hazard. Compressed Gases: Pressure below OSHA definition.
dermal necrosis.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 7 OF 9
DEFINITIONS OF TERMS (Continued)
HAZARDOUS MATERIALS IDENTIFICATION SYSTEM NATIONAL FIRE PROTECTION ASSOCIATION HAZARD
HAZARD RATINGS (continued): RATINGS (continued):
PHYSICAL HAZARD (continued): HEALTH HAZARD (continued): 3 (materials that can on short exposure
Pyrophorics: No Rating. Oxidizers: Packaging Group III; Solids: could cause serious temporary or residual injury); 4 (materials that
any material that in either concentration tested, exhibits a mean under very short exposure could cause death or major residual injury).
burning time less than or equal to the mean burning time of a 3:7 FLAMMABILITY HAZARD: 0 Materials that will not burn under
potassium bromate/cellulose mixture and the criteria for Packing typical fire conditions, including intrinsically noncombustible materials
Group I and II are not met. Liquids: any material that exhibits a such as concrete, stone, and sand. 1 Materials that must be
mean pressure rise time less than or equal to the pressure rise time preheated before ignition can occur. Materials in this degree require
of a 1:1 nitric acid (65%)/cellulose mixture and the criteria for considerable preheating, under all ambient temperature conditions,
Packing Group I and II are not met. Unstable Reactives: Substances before ignition and combustion can occur 2 Materials that must be
that may decompose, condense or self-react, but only under moderately heated or exposed to relatively high ambient
conditions of high temperature and/or pressure and have little or no temperatures before ignition can occur. Materials in this degree
potential to cause significant heat generation or explosive hazard. would not under normal conditions form hazardous atmospheres with
Substances that readily undergo hazardous polymerization in the air, but under high ambient temperatures or under moderate heating
absence of inhibitors.); 2 (Water Reactivity: Materials that may react could release vapor in sufficient quantities to produce hazardous
violently with water. Organic Peroxides: Materials that, in atmospheres with air. 3 Liquids and solids that can be ignited under
themselves, are normally unstable and will readily undergo violent almost all ambient temperature conditions. Materials in this degree
chemical change, but will not detonate. These materials may also produce hazardous atmospheres with air under almost all ambient
react violently with water. Explosives: Division 1.4 � Explosive temperatures or, though unaffected by ambient temperatures, are
substances where the explosive effect are largely confined to the readily ignited under almost all conditions. 4 Materials that will
package and no projection of fragments of appreciable size or range rapidly or completely vaporize at atmospheric pressure and normal
are expected. An external fire must not cause virtually instantaneous ambient temperature or that are readily dispersed in air and will burn
explosion of almost the entire contents of the package. Compressed readily.
Gases: Pressurized and meet OSHA definition but < 514.7 psi INSTABILITY HAZARD: 0 Materials that in themselves are normally
absolute at 21.1°C (70°F) [500 psig]. Pyrophorics: No Rating. stable, even under fire conditions. 1 Materials that in themselves are
Oxidizers: Packing Group II Solids: any material that, either in normally stable, but that can become unstable at elevated
concentration tested, exhibits a mean burning time of less than or temperatures and pressures. 2 Materials that readily undergo
equal to the mean burning time of a 2:3 potassium bromate/cellulose violent chemical change at elevated temperatures and pressures. 3
mixture and the criteria for Packing Group I are not met. Liquids: Materials that in themselves are capable of detonation or explosive
any material that exhibits a mean pressure rise time less than or decomposition or explosive reaction, but that require a strong
equal to the pressure rise of a 1:1 aqueous sodium chlorate solution initiating source or that must be heated under confinement before
(40%)/cellulose mixture and the criteria for Packing Group I are not initiation. 4 Materials that in themselves are readily capable of
met. Unstable Reactives: Substances that may polymerize, detonation or explosive decomposition or explosive reaction at
decompose, condense, or self-react at ambient temperature and/or normal temperatures and pressures.
pressure, but have a low potential for significant heat generation or FLAMMABILITY LIMITS IN AIR: Much of the information related
explosion. Substances that readily form peroxides upon exposure to to fire and explosion is derived from the National Fire Protection
air or oxygen at room temperature); 3 (Water Reactivity: Materials Association (NFPA). Flash Point - Minimum temperature at which a
that may form explosive reactions with water. Organic Peroxides: liquid gives off sufficient vapors to form an ignitable mixture with air.
Materials that are capable of detonation or explosive reaction, but Autoignition Temperature: The minimum temperature required to
require a strong initiating source, or must be heated under initiate combustion in air with no other source of ignition. LEL - the
confinement before initiation; or materials that react explosively with lowest percent of vapor in air, by volume, that will explode or ignite in
water. Explosives: Division 1.2 � Explosive substances that have a the presence of an ignition source. UEL - the highest percent of vapor
fire hazard and either a minor blast hazard or a minor projection in air, by volume, that will explode or ignite in the presence of an
hazard or both, but do not have a mass explosion hazard. ignition source.
Compressed Gases: Pressure > 514.7 psi absolute at 21.1°C (70°F)
TOXICOLOGICAL INFORMATION:
[500 psig]. Pyrophorics: No Rating. Oxidizers: Packing Group I
Human and Animal Toxicology: Possible health hazards as derived
Solids: any material that, in either concentration tested, exhibits a
from human data, animal studies, or from the results of studies with
mean burning time less than the mean burning time of a 3.:2
similar compounds are presented. Definitions of some terms used in
potassium bromate/cellulose mixture. Liquids: Any material that
this section are: LD50 - Lethal Dose (solids & liquids) which kills 50% of
spontaneously ignites when mixed with cellulose in a 1:1 ratio, or
the exposed animals; LC50 - Lethal Concentration (gases) which kills
which exhibits a mean pressure rise time less than the pressure rise
50% of the exposed animals; ppm concentration expressed in parts of
time of a 1:1 perchloric acid (50%)/cellulose mixture. Unstable 3
material per million parts of air or water; mg/m concentration
Reactives: Substances that may polymerize, decompose, condense
expressed in weight of substance per volume of air; mg/kg quantity of
or self-react at ambient temperature and/or pressure and have a
material, by weight, administered to a test subject, based on their body
moderate potential to cause significant heat generation or
weight in kg. Other measures of toxicity include TDLo, the lowest dose
explosion.); 4 (Water Reactivity: Materials that react explosively with
to cause a symptom and TCLo the lowest concentration to cause a
water without requiring heat or confinement. Organic Peroxides:
symptom; TDo, LDLo, and LDo, or TC, TCo, LCLo, and LCo, the
Materials that are readily capable of detonation or explosive
lowest dose (or concentration) to cause lethal or toxic effects. Cancer
decomposition at normal temperature and pressures. Explosives:
Information: The sources are: IARC - the International Agency for
Division 1.1 & 1.2-explosive substances that have a mass explosion
Research on Cancer; NTP - the National Toxicology Program, RTECS
hazard or have a projection hazard. A mass explosion is one that
- the Registry of Toxic Effects of Chemical Substances, OSHA and
affects almost the entire load instantaneously. Compressed Gases:
CAL/OSHA. IARC and NTP rate chemicals on a scale of decreasing
No Rating. Pyrophorics: Add to the definition of Flammability �4�.
potential to cause human cancer with rankings from 1 to 4.
Oxidizers: No �4� rating. Unstable Reactives: Substances that may
Subrankings (2A, 2B, etc.) are also used. Other Information: BEI -
polymerize, decompose, condense or self-react at ambient
ACGIH Biological Exposure Indices, represent the levels of
temperature and/or pressure and have a high potential to cause
determinants which are most likely to be observed in specimens
significant heat generation or explosion.). 2 (materials that on intense
collected from a healthy worker who has been exposed to chemicals to
or continued exposure under fire conditions could cause temporary
the same extent as a worker with inhalation exposure to the TLV.
incapacitation or possible residual injury);
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 8 OF 9
DEFINITIONS OF TERMS (Continued)
ECOLOGICAL INFORMATION:
EC is the effect concentration in water. BCF = Bioconcentration Factor, which is used to determine if a substance will concentrate in lifeforms
which consume contaminated plant or animal matter. TLm = median threshold limit; Coefficient of Oil/Water Distribution is represented by log Kow
or log Koc and is used to assess a substance’s behavior in the environment.
REGULATORY INFORMATION:
U.S. and CANADA:
This section explains the impact of various laws and regulations on the material. ACGIH: American Conference of Governmental Industrial
Hygienists, a professional association which establishes exposure limits. EPA is the U.S. Environmental Protection Agency. NIOSH is the National
Institute of Occupational Safety and Health, which is the research arm of the U.S. Occupational Safety and Health Administration (OSHA). WHMIS
is the Canadian Workplace Hazardous Materials Information System. DOT and TC are the U.S. Department of Transportation and the Transport
Canada, respectively. Superfund Amendments and Reauthorization Act (SARA); the Canadian Domestic/Non-Domestic Substances List
(DSL/NDSL); the U.S. Toxic Substance Control Act (TSCA); Marine Pollutant status according to the DOT; the Comprehensive Environmental
Response, Compensation, and Liability Act (CERCLA or Superfund); and various state regulations. This section also includes information on the
precautionary warnings which appear on the material’s package label. OSHA - U.S. Occupational Safety and Health Administration.
SULFUR HEXAFLUORIDE - SF6 MSDS (Document # 001048) PAGE 9 OF 9
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