ICSC 0049 - CHLORODIFLUOROMETHANE

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CHLORODIFLUOROMETHANE

ICSC: 0049
_{July 2002}

Monochlorodifluoromethane
Methane, chlorodifluoro-
HCFC 22
R 22

CAS No: 75-45-6
RTECS No: PA6390000
UN No: 1018

(cylinder)
CHClF₂
Molecular mass: 86.5

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Combustible under specific conditions. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames.	In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION			In case of fire: keep cylinder cool by spraying with water.

EXPOSURE
Inhalation	Cardiac arrhythmia. Confusion. Drowsiness. Unconsciousness.	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin	ON CONTACT WITH LIQUID: FROSTBITE.	Cold-insulating gloves.	ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.
Eyes	Redness. Pain.	Safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion		Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Ventilation.	UN classification UN Hazard Class: 2.2	Special insulated cylinder.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-20G2A	Fireproof. Cool. Ventilation along the floor.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS COMPRESSED LIQUEFIED GAS

Physical dangers
The gas is heavier than air and may accumulate in low ceiling spaces causing deficiency of oxygen.

Chemical dangers
On contact with hot surfaces or flames this substance decomposes forming toxic and corrosive gases including hydrogen chloride (see ICSC0163), phosgene (See ICSC 0007), hydrogen fluoride (See ICSC 0283), carbonyl fluoride (See ICSC 0633). Attacks magnesium and its alloys.

Occupational exposure limits
TLV: 1000 ppm as TWA A4 (ACGIH 2001).
MAK: 500 ppm, 1800 mg/m³ Peak limitation category: II(8) Pregnancy risk group: C (DFG 2006).

Routes of exposure
The substance can be absorbed into the body by inhalation.

Inhalation risk
On loss of containment this gas can cause suffocation by lowering the oxygen content of the air in confined areas.

Effects of short-term exposure
Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the cardiovascular system and central nervous system, resulting in cardiac disorders and central nervous system depression. Exposure could cause lowering of consciousness. See Notes.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: -41°C Melting point: -146°C Relative density (water = 1): 1.21 Solubility in water, g/100 ml at 25°C: 0.3 Vapour pressure, kPa at 20°C: 908 Relative vapour density (air = 1): 3.0 Auto-ignition temperature: 632°C Octanol/water partition coefficient as log Pow: 1.08	This substance may be hazardous to the environment; special attention should be given to its impact on the ozone layer.

NOTES

High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering area.
The odour warning when the exposure limit value is exceeded is insufficient.
Do NOT use in the vicinity of a fire or a hot surface, or during welding.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Freon 22, Frigen 22, Halon 22 are trade names.
Card has been partially updated in July 2007: see Occupational Exposure Limits.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006

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 AS. Approved by GS. Last update: 29.01.2008