BUFFERED OXIDE ETCH
1. Product Identification
Synonyms: Aqueous NH4-HF Etchant Solutions
CAS No.: Not applicable to mixtures.
Molecular Weight: Not applicable to mixtures.
Chemical Formula: Not applicable to mixtures.
Product Codes: 1178, 5098, 5109, 5173, 5175, 5186, 5192, 5320, 5326, 5329, 5338,
5359, 5360, 5361, 5843, 9294
2. Composition/Information on Ingredients
Ingredient CAS No Percent
Hazardous
--------------------------------------- ------------ ------------
---------
Ammonium Fluoride 12125-01-8 30 - 50%
Yes
Hydrogen Fluoride 7664-39-3 0.5 - 10%
Yes
Water 7732-18-5 40 - 70%
No
3. Hazards Identification
Emergency Overview
--------------------------
POISON! DANGER! CORROSIVE. EXTREMELY HAZARDOUS LIQUID AND
VAPOR. CAUSES SEVERE BURNS WHICH MAY NOT BE IMMEDIATELY
PAINFUL OR VISIBLE. MAY BE FATAL IF SWALLOWED OR INHALED.
LIQUID AND VAPOR CAN BURN SKIN, EYES AND RESPIRATORY TRACT.
CAUSES BONE DAMAGE. AFFECTS RESPIRATORY SYSTEM, HEART,
CIRCULATORY SYSTEM, CENTRAL NERVOUS SYSTEM AND KIDNEYS.
HARMFUL IF ABSORBED THROUGH SKIN. REACTION WITH CERTAIN
METALS GENERATES FLAMMABLE AND POTENTIALLY EXPLOSIVE
HYDROGEN GAS.
J.T. Baker SAF-T-DATA(tm) Ratings (Provided here for your convenience)
-----------------------------------------------------------------------------------------------------------
Health Rating: 4 - Extreme (Poison)
Flammability Rating: 0 - None
Reactivity Rating: 2 - Moderate
Contact Rating: 4 - Extreme (Corrosive)
Lab Protective Equip: GOGGLES & SHIELD; LAB COAT & APRON; VENT HOOD;
PROPER GLOVES
Storage Color Code: White (Corrosive)
-----------------------------------------------------------------------------------------------------------
Potential Health Effects
----------------------------------
Exposure to hydrofluoric acid can produce harmful health effects that may not be
immediately apparent. If inhaled or swallowed, this compound can cause fluoride
poisoning. Early symptoms include nausea, vomiting, diarrhea, and weakness. Later
effects include central nervous system effects, cardiovascular effects and death.
Inhalation:
Severely corrosive to the respiratory tract. May cause sore throat, coughing, labored
breathing and lung congestion/inflammation. May be absorbed through inhalation of
vapors. Symptoms parallel those following ingestion exposure.
Ingestion:
Corrosive. May cause sore throat, abdominal pain, diarrhea, vomiting, severe burns of the
digestive tract, kidney dysfunction and brain damage. Affects the heart and circulatory
system.
Skin Contact:
Corrosive to the skin. Skin contact causes serious skin burns which may not be
immediately apparent or painful. Symptoms may be delayed 8 hours or longer. The
fluoride ion readily penetrates the skin causing destruction of deep tissue layers and even
bone.
Eye Contact:
Corrosive to the eyes. Symptoms of redness, pain, blurred vision, and permanent eye
damage may occur.
Chronic Exposure:
Intake of more than 6 mg of fluorine per day may result in fluorosis, bone and joint
damage. Hypocalcemia and hypomagnesemia can occur from absorption of fluoride ion
into blood stream.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders, eye problems, or impaired kidney or respiratory
function may be more susceptible to the effects of this substance.
4. First Aid Measures
For any route of contact: Detailed First Aid procedure should be planned before
beginning work with HF.
Inhalation:
Get medical help immediately. If patient is unconscious, give artificial respiration or use
inhalator. Keep patient warm and resting, and send to hospital after first aid is complete.
Ingestion:
If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water. Never
give anything by mouth to an unconscious person. Get medical attention immediately.
Skin Contact:
1) Remove the victim from the contaminated area and immediately place him under a
safety shower or wash him with a water hose, whichever is available. 2) Remove all
contaminated clothing. Handle all HF-contaminated material with gloves made of
appropriate material, such as PVC or neoprene. 3) Keep washing with large amounts of
water for a minimum of 15 minutes. 4) Have someone make arrangements for medical
attention while you continue flushing the affected area with water. 5) If the following
materials are available, limit the washing to five minutes and immerse the burned area in
a solution of 0.2% iced aqueous Hyamine 1622 or 0.13% iced aqueous Zephiran
Chloride. If immersion is not practical, towels should be soaked with one of the above
solutions and used as compresses for the burn area. Ideally compresses should be
changed every 2 minutes. Alternately, 2.5% calcium gluconate gel should be massaged
into the affected area. 6) Seek medical attention as soon as possible for all burns
regardless of how minor they may appear initially. Hyamine 1622 is a trade name for
tetracaine benzethonium chloride, Merck Index Monograph 1078, a quaternary
ammonium compound sold by Rohm & Haas, Philadelphia. Zephiran Chloride is a trade
name for benzalkonium chloride, Merck Index Monograph 1059, also a quaternary
ammonium compound, sold by Sanofi-Synthelabo Inc., New York, NY.
Eye Contact:
1) Irrigate eyes for at least 30 minutes with copious quantities of water, keeping the
eyelids apart and away from eyeballs during irrigation. 2) Get competent medical
attention immediately, preferably an eye specialist. 3) If a physician is not immediately
available, apply one or two drops of ophthalmic anesthetic, (e.g., 0.5% Pontocaine
Hydrochloride solution). 4) Do not use oily drops, ointment or HF skin burn treatments.
Place ice pack on eyes until reaching emergency room.
Note to Physician:
General: For burns of moderate areas, (greater than 8 square inches), ingestion and
significant inhalation exposure, severe systemic effects may occur, and admission to a
critical care unit should be considered. Monitor and correct for hypocalcemia, cardiac
arrhythmias, hypomagnesemia and hyperkalemia. In some cases renal dialysis may be
indicated.
Inhalation: Treat as chemical pneumonia. Monitor for hypocalcemia, 2.5% calcium
gluconate in normal saline by nebulizer or by IPPB with 100% oxygen may decrease
pulmonary damage. Bronchodilators may also be administered.
Skin: For deep skin burns or contact with concentrated HF (over 50%) solution, consider
infiltration about the affected area with 5% calcium gluconate [equal parts of 10%
calcium gluconate and sterile saline for injection]. Burns beneath the nail may require
splitting the nail and application of calcium gluconate to the exposed nail bed. For certain
burns, especially of the digits, use of intra-arterial calcium gluconate may be indicated.
Eyes: Irrigation may be facilitated by use of Morgan lens or similar ocular irrigator, using
1% aqueous calcium gluconate solution [50ml of calcium gluconate 10% in 500 ml
normal saline].
AN ALTERNATIVE FIRST AID PROCEDURE: The effect of HF, i.e. onset of pain,
particularly in dilute solutions, may not be felt for up to 24 hours. It is important,
therefore, that persons using HF have immediate access to an effective antidote even
when they are away from their work place in order that first aid treatment can be
commenced immediately.
We recommend that any person in contact with HF should carry, or have access to a tube
of HF Antidote Gel at all times; ideally with one tube at the work place, one on the
person and one at home.
It is imperative that any person who has been contaminated by HF should seek medical
advice when the treatment by HF Antidote Gel has been applied.
REFERENCES: 1. Browno, T.D. Treatment of Hydrofluoric Acid Burns 2. Sprout, W.L.
et al Treatment of Severe Hydrofluoric Acid Exposures (Journal of American
Occupational Medicine 25:12, 1993) 3. Bracken, W.M. et al Comparative Effectiveness
of Topical Treatments for Hydrofluoric Acid Burns, University of Kansas (Journal of
Occupational Medicine 27:10:1985) 4. Burke, W.J. , et al Systemic Fluoride Poisoning
Resulting from A Fluoride Skin Burn (Journal of Occupational Medicine (5,39:1973)
HF ANTIDOTE GEL:
Distributed by Pharmascience Inc.
8400 Darnley Rd. Montreal, Canada. H4T 1M4
Phone: ( 514 ) 340 - 1114
Fax: ( 514 ) 342 - 7764
U.S. (Buffalo, NY) distributor: 1-800-207-4477
5. Fire Fighting Measures
Fire:
Not considered to be a fire hazard. If involved in a fire, can emit toxic fumes and
irritating and corrosive gases.
Explosion:
Violent exothermic reaction occurs with water. Sufficient heat may be produced to ignite
combustible materials. Reacts with metals forming flammable Hydrogen gas.
Fire Extinguishing Media:
Keep upwind of fire. Use water or carbon dioxide on fires in which Hydrofluoric Acid is
involved. Halon or foam may also be used. In case of fire, the sealed containers can be
kept cool by spraying with water.
Special Information:
In the event of a fire, wear full protective clothing and NIOSH-approved self-contained
breathing apparatus with full facepiece operated in the pressure demand or other positive
pressure mode. Avoid getting water in tanks or drums; water can cause generation of heat
and spattering. In contact with air, the acid gives off corrosive fumes which are heavier
than air.
6. Accidental Release Measures
Notify safety personnel, provide adequate ventilation, and remove ignition sources since
hydrogen may be generated by reactions with metals. Wear appropriate personal
protective equipment as specified in Section 8. Do not flush to sewers or waterways.
Spills: Evacuate the danger area. Apply magnesium sulfate (dry) to the spill area. Follow
up with inert absorbent and add soda ash or magnesium oxide and slaked lime. Collect in
appropriate plastic containers and save for disposal. Wash spill site with soda ash
solution. NOTE: Porous materials (concrete, wood, plastic, etc.) will absorb HF and
become a hazard for an indefinite time. Such spills should be cleaned and neutralized
immediately. US Regulations (CERCLA) require reporting spills and releases to soil,
water and air in excess of reportable quantities. The toll free number for the US Coast
Guard National Response Center is (800) 424-8802.
J. T. Baker TEAM庐 'Low Na+' acid neutralizer is recommended for spills of this
product.
7. Handling and Storage
Keep in tightly closed polyethylene containers. Store in a cool, dry place with adequate
ventilation separated from other chemicals. Protect from physical damage. Storage
facilities should be constructed for containment and neutralization of spills. Handling and
storage of HF requires special materials and technology for containers, pipes, valves, etc.,
which is available from suppliers. Containers of this material may be hazardous when
empty since they retain product residues (vapors, liquid); observe all warnings and
precautions listed for the product.
8. Exposure Controls/Personal Protection
Airborne Exposure Limits:
Hydrogen fluoride:
- OSHA Permissible Exposure Limit (PEL):
3 ppm (TWA)
- ACGIH Threshold Limit Value (TLV):
3 ppm Ceiling as F.
Ventilation System:
A system of local and/or general exhaust is recommended to keep employee exposures
below the Airborne Exposure Limits. Local exhaust ventilation is generally preferred
because it can control the emissions of the contaminant at its source, preventing
dispersion of it into the general work area. Please refer to the ACGIH document,
Industrial Ventilation, A Manual of Recommended Practices, most recent edition, for
details.
Personal Respirators (NIOSH Approved):
If the exposure limit is exceeded, a full facepiece respirator with an acid gas cartridge
may be worn up to 50 times the exposure limit or the maximum use concentration
specified by the appropriate regulatory agency or respirator supplier, whichever is lowest.
For emergencies or instances where the exposure levels are not known, use a full-
facepiece positive-pressure, air-supplied respirator. WARNING: Air purifying respirators
do not protect workers in oxygen-deficient atmospheres. Since the IDLH is low (30
ppm), the above cartridge system is not specifically approved for HF. (3M Respirator
Selection Guide)
Skin Protection:
Wear protective clothing, including boots or safety shoes with polyvinyl chloride (PVC)
or neoprene. Use chemical goggles and/or a full face shield. Wear coveralls with long
sleeves, gauntlets and gloves of PVC or neoprene. A high degree of protection is obtained
with an air-inflated suit with mask and safety belt. Use protection suitable for conditions.
Eye Protection:
Use chemical safety goggles and/or full face shield where splashing is possible. Maintain
eye wash fountain and quick drench facilities in work area.
9. Physical and Chemical Properties
Appearance:
Colorless liquid.
Odor:
No information found.
Solubility:
Soluble in water.
Specific Gravity:
1.10
pH:
1.0 (0.10M HF)
% Volatiles by volume @ 21C (70F):
80
Boiling Point:
No information found.
Melting Point:
18C (64F)
Vapor Density (Air=1):
No information found.
Vapor Pressure (mm Hg):
No information found.
Evaporation Rate (BuAc=1):
No information found.
10. Stability and Reactivity
Stability:
Stable at room temperature (68F) when stored and used under proper conditions.
Hazardous Decomposition Products:
On heating to decomposition, could yield toxic fumes of fluorides, nitric oxides, and
ammonia. On contact with metals, liberates hydrogen gas. Attacks glass and other silicon
containing compounds. Reacts with silica to produce silicon tetrafluoride, a hazardous
colorless gas.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
Hydrofluoric acid is incompatible with arsenic trioxide, phosphorus pentoxide, ammonia,
calcium oxide, sodium hydroxide, sulfuric acid, vinyl acetate, ethylenediamine, acetic
anhydride, alkalis, organic materials, most common metals, rubber, leather, water, strong
bases, carbonates, sulfides, cyanides, oxides of silicon, especially glass, concrete, silica,
fluorine. Will also react with steam or water to produce toxic fumes. Ammonium fluoride
reacts with strong acids to produce hazardous hydrogen fluoride gas or hydrofluoric acid.
Reacts with strong bases to yield ammonia. Avoid strong oxidizing agents.
Conditions to Avoid:
Heat, moisture, incompatibles.
11. Toxicological Information
Hydrofluoric acid: Inhalation rat LC50: 1276 ppm/1H; Investigated as a mutagen,
reproductive effector.
--------\Cancer Lists\-----------------------------------------------
-------
---NTP Carcinogen---
Ingredient Known Anticipated IARC
Category
------------------------------------ ----- ----------- ------
-------
Ammonium Fluoride (12125-01-8) No No
None
Hydrogen Fluoride (7664-39-3) No No
None
Water (7732-18-5) No No
None
12. Ecological Information
Environmental Fate:
If the pH is > 6.5, soil can bind fluorides tightly. High calcium content will immobilize
fluorides, which can be damaging to plants when present in acid soils.
Environmental Toxicity:
This material is expected to be slightly toxic to aquatic life.
13. Disposal Considerations
Whatever cannot be saved for recovery or recycling should be handled as hazardous
waste and sent to a RCRA approved incinerator or disposed in a RCRA approved waste
facility. Processing, use or contamination of this product may change the waste
management options. State and local disposal regulations may differ from federal
disposal regulations. Dispose of container and unused contents in accordance with
federal, state and local requirements.
14. Transport Information
Domestic (Land, D.O.T.)
-----------------------
Proper Shipping Name: CORROSIVE LIQUIDS, TOXIC, N.O.S. (HYDROFLUORIC
ACID, AMMONIUM FLUORIDE)
Hazard Class: 8, 6.1
UN/NA: UN2922
Packing Group: II
Information reported for product/size: 500LB
International (Water, I.M.O.)
-----------------------------
Proper Shipping Name: CORROSIVE LIQUIDS, TOXIC, N.O.S. (HYDROFLUORIC
ACID, AMMONIUM FLUORIDE)
Hazard Class: 8, 6.1
UN/NA: UN2922
Packing Group: II
Information reported for product/size: 500LB
15. Regulatory Information
--------\Chemical Inventory Status - Part 1\-------------------------
--------
Ingredient TSCA EC Japan
Australia
----------------------------------------------- ---- --- ----- --
-------
Ammonium Fluoride (12125-01-8) Yes Yes Yes
Yes
Hydrogen Fluoride (7664-39-3) Yes Yes Yes
Yes
Water (7732-18-5) Yes Yes Yes
Yes
--------\Chemical Inventory Status - Part 2\-------------------------
--------
--Canada--
Ingredient Korea DSL NDSL
Phil.
----------------------------------------------- ----- --- ---- -
----
Ammonium Fluoride (12125-01-8) Yes Yes No
Yes
Hydrogen Fluoride (7664-39-3) Yes Yes No
Yes
Water (7732-18-5) Yes Yes No
Yes
--------\Federal, State & International Regulations - Part 1\--------
--------
-SARA 302- ------SARA
313------
Ingredient RQ TPQ List
Chemical Catg.
----------------------------------------- --- ----- ---- ------
--------
Ammonium Fluoride (12125-01-8) No No No
No
Hydrogen Fluoride (7664-39-3) 100 100 Yes
No
Water (7732-18-5) No No No
No
--------\Federal, State & International Regulations - Part 2\--------
--------
-RCRA- -
TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ -----
-
Ammonium Fluoride (12125-01-8) 100 No No
Hydrogen Fluoride (7664-39-3) 100 U134 No
Water (7732-18-5) No No No
Chemical Weapons Convention: No TSCA 12(b): No CDTA: No
SARA 311/312: Acute: Yes Chronic: Yes Fire: No Pressure: No
Reactivity: No (Mixture / Liquid)
Australian Hazchem Code: None allocated.
Poison Schedule: S6
WHMIS:
This MSDS has been prepared according to the hazard criteria of the Controlled Products
Regulations (CPR) and the MSDS contains all of the information required by the CPR.
16. Other Information
NFPA Ratings: Health: 4 Flammability: 0 Reactivity: 1
Label Hazard Warning:
POISON! DANGER! CORROSIVE. EXTREMELY HAZARDOUS LIQUID AND
VAPOR. CAUSES SEVERE BURNS WHICH MAY NOT BE IMMEDIATELY
PAINFUL OR VISIBLE. MAY BE FATAL IF SWALLOWED OR INHALED. LIQUID
AND VAPOR CAN BURN SKIN, EYES AND RESPIRATORY TRACT. CAUSES
BONE DAMAGE. AFFECTS RESPIRATORY SYSTEM, HEART, CIRCULATORY
SYSTEM, CENTRAL NERVOUS SYSTEM AND KIDNEYS. HARMFUL IF
ABSORBED THROUGH SKIN. REACTION WITH CERTAIN METALS
GENERATES FLAMMABLE AND POTENTIALLY EXPLOSIVE HYDROGEN GAS.
Label Precautions:
Do not get in eyes, on skin, or on clothing.
Do not breathe vapor.
Keep container closed.
Cool before opening.
Use only with adequate ventilation.
Wash thoroughly after handling.
Store in a tightly closed container.
Label First Aid:
IN ALL CASES, CALL PHYSICIAN IMMEDIATELY. First Aid procedures should be
pre-planned for HF emergencies. A supply of 50:50 water/magnesium sulfate paste or 2
1/2% Calcium Gluconate paste should be available where first aid medications are
administered. If ingested, DO NOT INDUCE VOMITING. If patient is conscious, give
large quantities of milk or water and send to hospital. If inhaled and patient is
unconscious, give artificial respiration or use inhalator and send to hospital. In case of
eye contact, wash open eyes with large but gentle stream of water for 15 minutes. Place
ice pack on eyes until reaching emergency room. In case of skin contact, remove
contaminated clothing and wash burn area with plenty of water to remove acid. Cover
burn area with a poultice of 50:50 water/magnesium sulfate paste or 2 1/2% calcium
gluconate paste. Leave in place until medical help arrives or patient is transferred to
hospital.
Product Use:
Laboratory Reagent.
Revision Information:
MSDS Section(s) changed since last revision of document include: 4.
Disclaimer:
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Mallinckrodt Baker, Inc. provides the information contained herein in good faith
but makes no representation as to its comprehensiveness or accuracy. This
document is intended only as a guide to the appropriate precautionary handling of
the material by a properly trained person using this product. Individuals receiving
the information must exercise their independent judgment in determining its
appropriateness for a particular purpose. MALLINCKRODT BAKER, INC.
MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR
IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE WITH
RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE PRODUCT
TO WHICH THE INFORMATION REFERS. ACCORDINGLY,
MALLINCKRODT BAKER, INC. WILL NOT BE RESPONSIBLE FOR
DAMAGES RESULTING FROM USE OF OR RELIANCE UPON THIS
INFORMATION.
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Prepared by: Environmental Health & Safety
Phone Number: (314) 654-1600 (U.S.A.)
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