ICSC 0283 - HYDROGEN FLUORIDE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

HYDROGEN FLUORIDE

ICSC: 0283
_{April 2000}

Hydrofluoric acid, anhydrous

CAS No: 7664-39-3
RTECS No: MW7875000
UN No: 1052
EC No: 009-002-00-6

(cylinder)
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 but 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).	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.	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 take to a doctor.
Ingestion	Abdominal pain. Burning sensation. Diarrhoea. Nausea. Vomiting. Weakness. 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! Ventilation. Remove vapour with fine water spray. Gas-tight chemical protection suit including self-contained breathing apparatus.	T+ Symbol C Symbol R: 26/27/28-35 S: (1/2-)7/9-26-36/37/39-45 UN Hazard Class: 8 UN Subsidiary Risks: 6.1 UN Pack Group: I	Do not transport with food and feedstuffs.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-80S1052 or 80GCT1-I NFPA Code: H 3; F 0; R 2	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.

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

Occupational exposure limits
TLV: (as F) 0.5 ppm as TWA, 2 ppm (Ceiling value); BEI issued; (ACGIH 2005).
MAK: 1 ppm, 0.83 mg/m³; Peak limitation category: I(2); Pregnancy risk group: C;
MAK: BAT 7 mg/g creatinine; (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, the skin and the respiratory tract. Inhalation of this gas or vapour may cause lung oedema (see Notes). The substance may cause hypocalcemia. Exposure above the OEL may result in death. The effects may be delayed. Medical observation is indicated.

Effects of long-term or repeated exposure
The substance may cause fluorosis.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: 20°C Melting point: -83°C Relative density (water = 1): 1.0 as 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.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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.

Updated by {ModOper}. Approved by {ModAppr}. Last update: {ModDate}