SIGMA-ALDRICH
Material Safety Data Sheet
Date Printed: 09/AUG/2005
Date Updated: 25/MAR/2005
Version 1.6
According to 91/155/EEC
Classified as Hazardous according to the criteria of EU Annex 1 and
NOHSC.
1 - Product and Company Information
Product Name HYDROGEN SULFIDE, 99.5+%
Product Number 295442
Company Sigma-Aldrich Pty. Ltd.
12 Anella Avenue
Castle Hill NSW 2154
Technical Phone # +61 2 9841 0555 (1800 800 097)
Fax +61 2 9841 0500 (1800 800 096)
Emergency Phone # +44 8701906777 (1800 448 465)
2 - Composition/Information on Ingredients
Product Name CAS # EC no Annex I
Index Number
HYDROGEN SULFIDE 7783-06-4 231-977-3 016-001-00-4
Formula H2S
Molecular Weight 34.08 AMU
Synonyms Acide sulfhydrique (French) * Hydrogene sulfure
(French) * Hydrogen sulfide (ACGIH:OSHA) *
Hydrogen sulfuric acid * Idrogeno solforato
(Italian) * RCRA waste number U135 *
Schwefelwasserstoff (German) * Siarkowodor
(Polish) * Stink DAMP * Sulfureted hydrogen *
Sulfur hydride * Zwavelwaterstof (Dutch)
3 - Hazards Identification
SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT
Extremely flammable. Very toxic by inhalation. Very toxic to
aquatic organisms.
4 - First Aid Measures
AFTER INHALATION
If inhaled, remove to fresh air. If not breathing give
artificial respiration. If breathing is difficult, give oxygen.
AFTER SKIN CONTACT
In case of contact, immediately wash skin with soap and copious
amounts of water.
AFTER EYE CONTACT
Contamination of the eyes should be treated by immediate and
prolonged irrigation with copious amounts of water. Assure
adequate flushing of the eyes by separating the eyelids with
fingers.
5 - Fire Fighting Measures
EXTINGUISHING MEDIA
Suitable: Use water spray or fog nozzle to keep cylinder cool.
Move cylinder away from fire if there is no risk.
SPECIAL RISKS
Specific Hazard(s): Extremely flammable. Vapor may travel
considerable distance to source of ignition and flash back.
Emits toxic fumes under fire conditions.
Explosion Hazards: May form explosive mixtures with air
SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS
Wear self-contained breathing apparatus and protective clothing
to prevent contact with skin and eyes.
SPECIFIC METHOD(S) OF FIRE FIGHTING
Do not extinguish burning gas if flow cannot be shut off
immediately. Use water spray or fog nozzle to keep cylinder
cool. Move cylinder away from fire if there is no risk.
6 - Accidental Release Measures
PERSONAL PRECAUTION PROCEDURES TO BE FOLLOWED IN CASE OF LEAK OR SPILL
Evacuate area and keep personnel upwind. Shut off all sources of
ignition. Shut off leak if there is no risk.
PROCEDURE(S) OF PERSONAL PRECAUTION(S)
Wear self-contained breathing apparatus, rubber boots, and heavy
rubber gloves.
METHODS FOR CLEANING UP
Ventilate area and wash spill site after material pickup is
complete.
7 - Handling and Storage
HANDLING
Directions for Safe Handling: Do not breathe gas. Do not get in
eyes, on skin, on clothing. Avoid prolonged or repeated exposure.
STORAGE
Conditions of Storage: Keep tightly closed. Keep away from heat,
sparks, and open flame. Store in a cool dry place. Cylinder
temperature should not exceed 125藲F (52藲C).
SPECIAL REQUIREMENTS: Moisture sensitive.
8 - Exposure Controls / Personal Protection
ENGINEERING CONTROLS
Warning: suck-back into cylinder may cause rupture. Use
back-flow-preventive device in piping.
GENERAL HYGIENE MEASURES
Wash contaminated clothing before reuse. Wash thoroughly after
handling.
EXPOSURE LIMITS
Country Source Type Value
Poland NDS 10 MG/M3
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Poland NDSCh 20 MG/M3
Poland NDSP -
EXPOSURE LIMITS - DENMARK
Source Type Value
OEL TWA 15 mg/m3
10 ppm
EXPOSURE LIMITS - GERMANY
Source Type Value
TRGS 900 OEL 14 mg/m3
10 ppm
Remarks: =1=
EXPOSURE LIMITS - SWEDEN
Source Type Value
LLV (Level14 mg/m3
10 ppm
EXPOSURE LIMITS - SWITZERLAND
Source Type Value
OEL OEL 15 mg/m3
10 ppm
EXPOSURE LIMITS - UNITED KINGDOM
Source Type Value
OEL OEL 14 mg/m3
10 ppm
OEL STEL 21 mg/m3
15 ppm
PERSONAL PROTECTIVE EQUIPMENT
Respiratory Protection: Government approved respirator in
nonventilated areas and/or for exposure above the TLV or PEL.
Hand Protection: Compatible chemical-resistant gloves.
Eye Protection: Chemical safety goggles.
9 - Physical and Chemical Properties
Appearance Physical State: Gas
Color: Colorless
Odor: Stench.
Property Value At Temperature or Pressure
pH N/A
BP/BP Range -60 藲C 760 mmHg
MP/MP Range -85 藲C
Flash Point N/A
Flammability N/A
Autoignition Temp 500 藲C
Oxidizing Properties N/A
Explosive Properties N/A
Explosion Limits Lower: 4 %
Upper: 46 %
Vapor Pressure 13028.4 mmHg 21 藲C
SG/Density N/A
Partition Coefficient N/A
Viscosity N/A
Vapor Density 1.19 g/l 15 藲C
Saturated Vapor Conc. N/A
Evaporation Rate N/A
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Bulk Density N/A
Decomposition Temp. N/A
Solvent Content N/A
Water Content N/A
Surface Tension N/A
Conductivity N/A
Miscellaneous Data N/A
Solubility N/A
10 - Stability and Reactivity
STABILITY
Conditions to Avoid: Moisture.
Materials to Avoid: Strong oxidizing agents, Strong bases.
11 - Toxicological Information
RTECS NUMBER: MX1225000
ACUTE TOXICITY
LCLO
Inhalation
Human
600 ppm
30M
LCLO
Inhalation
Man
5700 UG/KG
Remarks: Behavioral:Coma. Lungs, Thorax, or Respiration:Chronic
pulmonary edema.
LCLO
Inhalation
Human
800 ppm
5M
LC50
Inhalation
Rat
444 ppm
Remarks: Lungs, Thorax, or Respiration:Other changes.
Gastrointestinal:Hypermotility, diarrhea. Kidney, Ureter,
Bladder:Urine volume increased.
LC50
Inhalation
Mouse
634 ppm
1H
SIGNS AND SYMPTOMS OF EXPOSURE
Hydrogen sulfide is recognized by its characteristic odor of
"rotten eggs". The detectable, minimum perceptible odor occurs
at 0.13ppm. At concentrations of 20ppm hydrogen sulfide begins
acting as an irritant on the mucous membranes of the eyes and
respiratory tract and increases with concentration and exposure
time. The irritant action and odor of rotten eggs often provides
the first warning of hydrogen sulfide exposure. Unfortunately,
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above 150ppm the gas exerts a paralyzing effect on the olfactory
apparatus. Prolonged exposure to moderate concentrations
(250ppm) may cause pulmonary edema. At concentrations over
500ppm, drowsiness, dizziness, excitement, headache, unstable
gait, and other systemic symptoms occur within a few minutes.
Sudden loss of consciousness without premonition, anxiety, or
sense of struggle are characteristic of acute exposure at
concentrations above 700ppm. At concentrations of 1000-2000ppm
hydrogen sulfide is rapidly absorbed through the lung into the
blood. Initially hyperpnea occurs, followed by rapid collapse
and respiratory inhibition. At higher concentrations, hydrogen
sulfide exerts an immediate paralyzing effect on the respiratory
centers. When concentration reaches 5000ppm, imminent death
almost always results. Generally speaking, imminent death due to
asphyxia can happen at any time when the concentration reaches
1000ppm or more. Exposure to and/or consumption of alcohol may
increase toxic effects.
ROUTE OF EXPOSURE
Skin Contact: May cause skin irritation.
Skin Absorption: May be harmful if absorbed through the skin.
Eye Contact: May cause eye irritation.
Inhalation: May be fatal if inhaled. Can cause rapid
suffocation. Material may be irritating to mucous membranes and
upper respiratory tract.
Ingestion: May be harmful if swallowed.
CHRONIC EXPOSURE - REPRODUCTIVE HAZARD
Species: Rat
Dose: 20 PPM
Route of Application: Inhalation
Exposure Time: (6-22D PREG/21D POST)
Result: Effects on Newborn: Physical.
12 - Ecological Information
No data available.
13 - Disposal Considerations
SUBSTANCE DISPOSAL
Contact a licensed professional waste disposal service to dispose
of this material. Observe all federal, state, and local
environmental regulations.
CONTAMINATED CONTAINER DISPOSAL
Caution: no-return cylinder. Do not reuse. Empty cylinder will
contain hazardous residue. Follow proper disposal techniques.
14 - Transport Information
RID/ADR
UN#: 1053
Class: 2
Proper Shipping Name: Hydrogen sulphide
IMDG
UN#: 1053
Class: 2.3
Subrisk: 2.1
Proper Shipping Name: Hydrogen sulphide
Marine Pollutant: No
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Severe Marine Pollutant: No
IATA
UN#: 1053
Class: 2.3
Subrisk: 2.1
Proper Shipping Name: HYDROGEN SULPHIDE, LIQUEFIED
Inhalation Packing Group I: Yes
15 - Regulatory Information
CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES
ANNEX I INDEX NUMBER: 016-001-00-4
INDICATION OF DANGER: F+ T+ N
Extremely Flammable. Very toxic. Dangerous for the environment.
R-PHRASES: 12 26 50
Extremely flammable. Very toxic by inhalation. Very toxic to
aquatic organisms.
S-PHRASES: 9 16 36 38 45 61
Keep container in a well-ventilated place. Keep away from
sources of ignition - no smoking. Wear suitable protective
clothing. In case of insufficient ventilation, wear suitable
respiratory equipment. In case of accident or if you feel
unwell, seek medical advice immediately (show the label where
possible). Avoid release to the environment. Refer to special
instructions/safety data sheets.
COUNTRY SPECIFIC INFORMATION
Germany
WGK: 2
SWITZERLAND
SWISS POISON CLASS: 2
16 - Other Information
WARRANTY
The above information is believed to be correct but does not
purport to be all inclusive and shall be used only as a guide. The
information in this document is based on the present state of our
knowledge and is applicable to the product with regard to
appropriate safety precautions. It does not represent any
guarantee of the properties of the product. Sigma-Aldrich Inc.,
shall not be held liable for any damage resulting from handling or
from contact with the above product. See reverse side of invoice
or packing slip for additional terms and conditions of sale.
Copyright 2005 Sigma-Aldrich Co. License granted to make unlimited
paper copies for internal use only.
DISCLAIMER
For R&D use only. Not for drug, household or other uses.
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