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HYDROGEN FLUORIDE
(cylinder)
ICSC: 0283
Peer-Review Status: 04.12.2000 Validated
Hydrofluoric acid, anhydrous 
CAS #: 7664-39-3 RTECS #: MW7875000
UN #: 1052
EC #: 009-002-00-6
EINECS #: 231-634-8
    Formula: HF
Molecular mass: 20.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible. Many reactions may cause fire or explosion.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION     In case of fire: keep cylinder cool by spraying with water. NO direct contact with water. Combat fire from a sheltered position. 
 
EXPOSURE   AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Burning sensation. Cough. Dizziness. Headache. Laboured breathing. Nausea. Shortness of breath. Sore throat. Vomiting. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Pain. Serious skin burns. Blisters. See Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Severe deep burns.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Burning sensation. Diarrhoea. Nausea. Vomiting. Weakness. Shock or collapse.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. Ventilation. Remove vapour with fine water spray.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: T+, C; R: 26/27/28-35; S: (1/2)-7/9-26-36/37/39-45 
UN Classification
UN Hazard Class: 8; UN Subsidiary Risks: 6.1; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-80S1052 or 80GCT1-I.
NFPA Code: H3; F0; R2. 
Fireproof. Separated from food and feedstuffs. See Chemical Dangers. Cool. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS GAS OR COLOURLESS FUMING LIQUID WITH PUNGENT ODOUR. 

Physical dangers
 

Chemical dangers
The substance is a strong acid. It reacts violently with bases and is corrosive. Reacts violently with many compounds. This generates fire and explosion hazard. Attacks metals, glass, some forms of plastic, rubber and coatings. 

Occupational exposure limits
TLV (as F): 0.5ppm as TWA; BEI issued; (ACGIH 2005).
TLV (as F): 2ppm (ceiling value); BEI issued; (ACGIH 2005).
MAK: 1 ppm, 0.83 mg/m³; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2005). 

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Inhalation of the gas or vapour may cause lung oedema. See Notes. Exposure could cause hypocalcemia. Exposure above the OEL could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
May cause fluorosis. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 20°C
Melting point: -83°C
Relative density (water = 1): 1.0 (liquid at 4°C)
Solubility in water: very good
Vapour pressure, kPa at 25°C: 122
Relative vapour density (air = 1): 0.7  
 

NOTES
The occupational exposure limit value should not be exceeded during any part of the working exposure.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Depending on the degree of exposure, periodic medical examination is suggested.
UN number for hydrogen fluoride in aqueous solution: 1790, hazard class 8, subsidiary hazard 6.1, pack group I (>60%).
Card has been partly updated in April 2005.
See sections Occupational Exposure Limits, Emergency Response. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       Hydrogen fluoride (PIM 268)