ICSC 1106 - DICHLOROMONOFLUOROMETHANE

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

DICHLOROMONOFLUOROMETHANE

ICSC: 1106
_{October 1999}

Fluorodichloromethane
HCFC 21
Fluorocarbon 21

CAS No: 75-43-4
RTECS No: PA8400000
UN No: 1029

(cylinder)
CHCl₂F
Molecular mass: 102.9

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.		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	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. Protective clothing.	ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.
Eyes		Safety goggles 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		Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Ventilation. NEVER direct water jet on liquid. Do NOT let this chemical enter the environment. Personal protection: self-contained breathing apparatus.	UN Hazard Class: 2.2

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-20G2A	Fireproof if in building.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS GAS OR COMPRESSED LIQUEFIED GAS, WITH CHARACTERISTIC ODOUR.

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

Chemical dangers
The substance decomposes on heating producing corrosive and highly toxic fumes (hydrogen chloride - see ICSC 0163, hydrogen fluoride - see ICSC 0283, and phosgene - see ICSC 0007). Reacts with powdered aluminium, zinc and magnesium. Reacts with acids or acid fumes producing highly toxic fumes (chlorides, fluorides). Attacks some forms of plastic, rubber and coatings.

Occupational exposure limits
TLV: 10 ppm as TWA; (ACGIH 2004).
MAK: 10 ppm, 43 mg/m³; Peak limitation category: II(2); (DFG 2004).

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

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 liquid may cause frostbite. The substance may cause effects on the central nervous system at high concentrations. Exposure far above the OEL could cause cardiac dysrhythmia.

Effects of long-term or repeated exposure
The substance may have effects on the liver.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: 8.9°C Melting point: -135°C Solubility in water: poor (1 g/100 ml at 20°C) Vapour pressure, kPa at 21°C: 159 Relative vapour density (air = 1): 3.8 Auto-ignition temperature: 522°C Octanol/water partition coefficient as log Pow: 1.55	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.
No odour warning if toxic concentrations are present.
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.
Freon21, Genetron 21, Arcton 7 and Algofrene type 5 are trade names.
Card has been partly updated in April 2005. See sections Emergency response, 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 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.

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