International Chemical Safety Cards

DICHLORODIFLUOROMETHANE ICSC: 0048

DICHLORODIFLUOROMETHANE
Difluorodichloromethane
R 12
(cylinder)
CCl2F2
Molecular mass: 120.9
CAS # 75-71-8
RTECS # PA8200000
ICSC # 0048
UN # 1028

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 Risk of fire and explosion (see Chemical Dangers).

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.
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


SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Ventilation. NEVER direct water jet on liquid.
Separated from metals (see Chemical Dangers). Cool. Ventilation along the floor.
Special insulated cylinder.
UN Hazard Class: 2.2
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0048 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

DICHLORODIFLUOROMETHANE ICSC: 0048

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PHYSICAL STATE; APPEARANCE:
COLOURLESS 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:
On contact with hot surfaces or flames this substance decomposes forming corrosive and very toxic fumes (hydrogen chloride, ICSC # 0163; phosgene, ICSC # 0007; chlorine, ICSC # 0126; hydrogen fluoride, ICSC # 0283). Reacts violently with metals such as calcium, magnesium, potassium, sodium, zinc and powdered aluminium. Attacks magnesium and its alloys.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV (as TWA): 1000 ppm; 4950 mg/m3 (ACGIH 1992-1993).
MAK: 1000 ppm; 5000 mg/m3; IV, C (1992).


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:
The liquid may cause frostbite. Exposure could cause cardiac arrythmia and asphyxiation. See Notes.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
 Boiling point: -30°C
Melting point: -158°C
Relative density (water = 1): 1.5
Solubility in water, g/100 ml at 20°C: 0.03 		Vapour pressure, kPa at 20°C: 568
Relative vapour density (air = 1): 4.2
Octanol/water partition coefficient as log Pow: 2.16
ENVIRONMENTAL
DATA
 This substance may be hazardous to the environment; special attention should be given to air.
N O T E S
To physicians: adrenergic agents are contraindicated. 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 12, Frigen 12, Halon 12 are trade names.
Transport Emergency Card: TEC (R)-20G08
ADDITIONAL INFORMATION


ICSC: 0048 DICHLORODIFLUOROMETHANE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.