International Chemical Safety Cards

DICHLOROMONOFLUOROMETHANE

ICSC: 1106

Fluorodichloromethane
HCFC 21
Fluorocarbon 21
CHCl₂F
Molecular mass: 102.9
(cylinder)

ICSC #    1106
CAS #     75-43-4
RTECS # PA8400000
UN #        1029
October 19, 1999 Peer reviewed

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: all extinguishing agents allowed.
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 if indicated. 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

STORAGE

PACKAGING & LABELLING

Ventilation. NEVER direct water jet on liquid. Do NOT let this chemical enter the environment. (Extra personal protection: self-contained breathing apparatus).

Fireproof if in building.

R:
S:
UN Hazard Class: 2.2

SEE IMPORTANT INFORMATION ON BACK

ICSC: 1106

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards

DICHLOROMONOFLUOROMETHANE

ICSC: 1106

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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 plastics, rubber and coatings.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 ppm; (as TWA) (ACGIH 1999).
MAK: 10 ppm; 45 mg/m³; (1995)
OSHA PEL: TWA 1000 ppm (4200 mg/m³)
NIOSH REL: TWA 10 ppm (40 mg/m³)
NIOSH IDLH: 5000 ppm

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 OEL could cause cardiac dysrhythmia.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the liver.

PHYSICAL
PROPERTIES

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

ENVIRONMENTAL
DATA

This substance may be hazardous to the environment; special attention should be given to its impact on the ozone layer.

N O T E S

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.

Transport Emergency Card: TEC (R)-20G39

ADDITIONAL INFORMATION

ICSC: 1106	DICHLOROMONOFLUOROMETHANE
(C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE:

Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.