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MSDS Material Safety Data Sheet
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File Name: airgas_com---001077.asp
               Material Safety Data Sheet
Hydrogen Fluoride

Section 1. Chemical product and company identification
: Hydrogen Fluoride
Product Name
: AIRGAS INC., on behalf of its subsidiaries
Supplier
259 North Radnor-Chester Road
Suite 100
Radnor, PA 19087-5283
1-610-687-5253
: Synthetic/Analytical chemistry.
Product use
: anhydrous hydrofluoric acid; hf-a; hydrofluoric acid
Synonym
: 001077
MSDS#
: 11/5/2007.
Date of
Preparation/Revision
: 1-866-734-3438
In case of emergency

Section 2. Hazards identification
: Gas. (COLORLESS GAS WITH AN IRRITATING ODOR)
Physical state
: Danger!
Emergency overview
CAUSES SEVERE RESPIRATORY TRACT, EYE AND SKIN BURNS.
CONTENTS UNDER PRESSURE.
HARMFUL IF INHALED.
CAUSES DAMAGE TO THE FOLLOWING ORGANS: LUNGS, RESPIRATORY TRACT,
SKIN, EYES, BONES, EYE, LENS OR CORNEA.
Do not get in eyes, on skin or clothing. Do not breathe gas. Do not puncture or
incinerate container. Keep container closed. Use only with adequate ventilation. Wash
thoroughly after handling.
Contact with rapidly expanding gases can cause frostbite.
: Inhalation,Dermal,Eyes
Routes of entry
Potential acute health effects
Severely corrosive to the eyes.
Eyes :
Severely corrosive to the skin.
Skin :
Toxic by inhalation. Severely corrosive to the respiratory system.
Inhalation :
Ingestion is not a normal route of exposure for gases
:
Ingestion
CARCINOGENIC EFFECTS Not available.
:
Potential chronic health :
MUTAGENIC EFFECTS Not available.
:
effects
TERATOGENIC EFFECTS Not available.
:
: Repeated exposure to a highly toxic material may produce general deterioration of health
Medical conditions
aggravated by overexposure by an accumulation in one or many human organs.
See toxicological Information (section 11)

Section 3. Composition, Information on Ingredients
Name CAS number % Volume Exposure limits
Hydrogen Fluoride 7664-39-3 100 ACGIH TLV (United States, 1/2006). Skin
Notes: as F
Substances for which there is a Biological
Exposure Index or Indices ACGIH 2005
Adoption
CEIL: 2 ppm
TWA: 0.5 ppm 65534 times per shift, 8 hour
(s).
NIOSH REL (United States, 12/2001). Notes:
as F
CEIL: 5 mg/m 3 65534 times per shift, 15

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Hydrogen Fluoride
minute(s).
CEIL: 6 ppm 65534 times per shift, 15
minute(s).
TWA: 2.5 mg/m 3 65534 times per shift, 10
hour(s).
TWA: 3 ppm 65534 times per shift, 10 hour
(s).
OSHA PEL (United States, 11/2006). Notes:
as F
TWA: 2.5 mg/m 3 65534 times per shift, 8
hour(s).
OSHA PEL Z2 (United States, 11/2006).
TWA: 3 ppm 65534 times per shift, 8 hour
(s).

Section 4. First aid measures
No action shall be taken involving any personal risk or without suitable training.If fumes are still suspected to be present,
the rescuer should wear an appropriate mask or a self-contained breathing apparatus.It may be dangerous to the person
providing aid to give mouth-to-mouth resuscitation.
: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes.
Eye contact
Get medical attention immediately.
: In case of contact, immediately flush skin with plenty of water for at least 15 minutes
Skin contact
while removing contaminated clothing and shoes. Wash clothing before reuse.
Thoroughly clean shoes before reuse. Get medical attention immediately.
: Try to warm up the frozen tissues and seek medical attention.
Frostbite
: If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is
Inhalation
difficult, give oxygen. Get medical attention immediately.
: Do NOT induce vomiting unless directed to do so by medical personnel. Never give
Ingestion
anything by mouth to an unconscious person. Get medical attention immediately.

Section 5. Fire fighting measures
Flammability of the product : Non-flammable.
: Use an extinguishing agent suitable for surrounding fires.
Fire fighting media and
instructions
If involved in fire, shut off flow immediately if it can be done without risk. Apply water
from a safe distance to cool container and protect surrounding area.
No specific hazard.
: Fire fighters should wear appropriate protective equipment and self-contained breathing
Special protective
apparatus (SCBA) with a full facepiece operated in positive pressure mode.
equipment for fire-fighters

Section 6. Accidental release measures
: Immediately contact emergency personnel. Keep unnecessary personnel away. Use
Personal precautions
suitable protective equipment (Section 8). Shut off gas supply if this can be done safely.
Isolate area until gas has dispersed.
Environmental precautions : Avoid dispersal of spilled material and runoff and contact with soil, waterways, drains
and sewers.

Section 7. Handling and storage
: Do not get in eyes, on skin or on clothing. Keep container closed. Use only with
Handling
adequate ventilation. Do not puncture or incinerate container. Wash thoroughly after
handling. Use equipment rated for cylinder pressure. Close valve after each use and
when empty.




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Hydrogen Fluoride

: Keep container tightly closed. Keep container in a cool, well-ventilated area. Cylinders
Storage
should be stored upright, with valve protection cap in place, and firmly secured to
prevent falling or being knocked over. Cylinder temperatures should not exceed 52 掳C
(125 掳F).
CAUTION: There is a potential over-pressure hazard with long term storage of carbon
steel containers and
Hydrogen Fluoride. Hydrogen Fluoride in the carbon steel container reacts very slowly
with the iron in the
steel to form iron fluoride and hydrogen which builds pressure within the container.
Hydrogen Fluoride in
carbon steel containers should not be stored for extended periods of time (recommend
less than two years).
Extreme caution should be taken during the handling of any carbon steel containers
storing Hydrogen
Fluoride that have been stored for extended periods of time.

Section 8. Exposure Controls, Personal Protection
: Use only with adequate ventilation. If user operations generate dust, fumes, vapor or
Engineering controls
mist, use process enclosures, local exhaust ventilation, or other engineering controls to
keep worker exposure to airborne contaminants below any recommended or statutory
limits.
Personal protection
: Safety eyewear complying with an approved standard should be used when a risk
Eyes
assessment indicates this is necessary to avoid exposure to liquid splashes, mists or
dusts.
: Personal protective equipment for the body should be selected based on the task being
Skin
performed and the risks involved and should be approved by a specialist before handling
this product.
: Use a properly fitted, air-purifying or air-fed respirator complying with an approved
Respiratory
standard if a risk assessment indicates this is necessary.Respirator selection must be
based on known or anticipated exposure levels, the hazards of the product and the safe
working limits of the selected respirator.
The applicable standards are (US) 29 CFR 1910.134 and (Canada) Z94.4-93
: Chemical-resistant, impervious gloves or gauntlets complying with an approved standard
Hands
should be worn at all times when handling chemical products if a risk assessment
indicates this is necessary.
Personal protection in case : Full chemical resistant suit and self-contained breathing apparatus only by trained and
authorized persons.
of a large spill
Consult local authorities for acceptable exposure limits.

Section 9. Physical and chemical properties
20.01 g/mole
Molecular weight :
F-H
Molecular formula :
18.65掳C (65.6掳F)
Boiling/condensation point :
-83.6掳C (-118.5掳F)
Melting/freezing point :
188掳C (370.4掳F)
Critical temperature :
0.5 psig
Vapor pressure :
0.7 (Air = 1)
Vapor density :
Specific Volume (ft3/lb) 5.03778
:
Gas Density (lb/ft3) 0.1985
:




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Hydrogen Fluoride


Section 10. Stability and reactivity
: The product is stable.
Stability and reactivity
Incompatibility with various : Extremely reactive or incompatible with alkalis.
Reactive with metals.
substances
Hazardous decomposition : These products are halogenated compounds, hydrogen fluoride.
products

Section 11. Toxicological information
Toxicity data
Ingredient name Test Result Route Species
Hydrogen Fluoride LDLo 500 mg/kg Dermal Mouse
LC50 1276 ppm (1 Inhalation Rat
hour(s))
LC50 342 ppm (1 hour Inhalation Mouse
(s))
: 30 ppm
IDLH
Chronic effects on humans : Causes damage to the following organs: lungs, upper respiratory tract, skin, eyes,
bones, eye, lens or cornea.

: Extremely hazardous in case of skin contact (corrosive), of eye contact (corrosive), of
Other toxic effects on
inhalation (lung corrosive).
humans
Specific effects
: No known significant effects or critical hazards.
Carcinogenic effects
: No known significant effects or critical hazards.
Mutagenic effects
: No known significant effects or critical hazards.
Reproduction toxicity

Section 12. Ecological information
: These products are halogenated compounds.
Products of degradation
: The products of degradation are less toxic than the product itself.
Toxicity of the products of
biodegradation
: Not available.
Environmental fate
: No known significant effects or critical hazards.
Environmental hazards
: Not available.
Toxicity to the environment

Section 13. Disposal considerations
Product removed from the cylinder must be disposed of in accordance with appropriate Federal, State, local
regulation.Return cylinders with residual product to Airgas, Inc.Do not dispose of locally.

Section 14. Transport information
Regulatory UN number Proper shipping Class Packing group Label Additional
information name information

DOT Classification UN1052 HYDROGEN 8 Not applicable (gas). Reportable
FLUORIDE, quantity
CORROSIVE

ANHYDROUS 100 lbs. (45.36
8

kg)

Limited
POISON



quantity
6


Yes.

Packaging
instruction
Passenger

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Hydrogen Fluoride
Aircraft
Quantity
limitation:
Forbidden.

Cargo Aircraft
Quantity
limitation:
Forbidden.

Special
provisions
3, B7, B46,
B71, B77, T10,
TP2, T6
TDG Classification UN1052 HYDROGEN 8 Not applicable (gas). Explosive
FLUORIDE, Limit and
ANHYDROUS Limited
8

Quantity
Index
0
6


ERAP Index
1000

Passenger
Carrying Ship
Index
Forbidden

Passenger
Carrying
Road or Rail
Index
Forbidden
UN1052 HYDROGEN 8 Not applicable (gas). -
Mexico
FLUORIDE,
Classification CORROSIVE

ANHYDROUS 8




POISON


6




Section 15. Regulatory information
United States
: TSCA 8(b) inventory: hydrogen fluoride
U.S. Federal regulations
TSCA precursor chemical list: hydrogen fluoride
SARA 302/304/311/312 extremely hazardous substances: hydrogen fluoride
SARA 302/304 emergency planning and notification: hydrogen fluoride
SARA 302/304/311/312 hazardous chemicals: hydrogen fluoride
SARA 311/312 MSDS distribution - chemical inventory - hazard identification: hydrogen
fluoride: Immediate (Acute) Health Hazard, Delayed (Chronic) Health Hazard
Clean Water Act (CWA) 307: No products were found.
Clean Water Act (CWA) 311: hydrogen fluoride
Clean air act (CAA) 112 accidental release prevention: hydrogen fluoride
Clean air act (CAA) 112 regulated flammable substances: No products were found.
Clean air act (CAA) 112 regulated toxic substances: hydrogen fluoride
SARA 313

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Hydrogen Fluoride

Product name CAS number Concentration
: Hydrogen Fluoride 7664-39-3 100
Form R - Reporting
requirements
: Hydrogen Fluoride 7664-39-3 100
Supplier notification
SARA 313 notifications must not be detached from the MSDS and any copying and redistribution of the MSDS shall
include copying and redistribution of the notice attached to copies of the MSDS subsequently redistributed.
: Pennsylvania RTK: hydrogen fluoride: (environmental hazard, generic environmental
State regulations
hazard)
Massachusetts RTK: hydrogen fluoride
New Jersey: hydrogen fluoride
Canada
: Class D-1A: Material causing immediate and serious toxic effects (VERY TOXIC).
WHMIS (Canada)
Class D-2A: Material causing other toxic effects (VERY TOXIC).
Class E: Corrosive gas.
CEPA DSL: hydrogen fluoride

Section 16. Other information
United States
: CAUSES SEVERE RESPIRATORY TRACT, EYE AND SKIN BURNS.
Label Requirements
CONTENTS UNDER PRESSURE.
HARMFUL IF INHALED.
CAUSES DAMAGE TO THE FOLLOWING ORGANS: LUNGS, RESPIRATORY TRACT,
SKIN, EYES, BONES, EYE, LENS OR CORNEA.
Canada
: Class D-1A: Material causing immediate and serious toxic effects (VERY TOXIC).
Label Requirements
Class D-2A: Material causing other toxic effects (VERY TOXIC).
Class E: Corrosive gas.
*4
Hazardous Material : Health
Information System (U.S.A.)
0
Fire hazard
1
Reactivity
X
Personal protection

National Fire Protection :
Flammability
0
Association (U.S.A.)
4 1
Health Instability
Special


Notice to reader
To the best of our knowledge, the information contained herein is accurate. However, neither the above named
supplier nor any of its subsidiaries assumes any liability whatsoever for the accuracy or completeness of the
information contained herein.
Final determination of suitability of any material is the sole responsibility of the user. All materials may present
unknown hazards and should be used with caution. Although certain hazards are described herein, we cannot
guarantee that these are the only hazards that exist.




Build 1.1 Page: 6/6

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