ICSC 0687 - VINYLIDENE FLUORIDE

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

VINYLIDENE FLUORIDE

ICSC: 0687
_{October 1997}

1,1-Difluoroethylene
1,1-Difluoroethene
R1132a
Vinylidene difluoride

CAS No: 75-38-7
RTECS No: KW0560000
UN No: 1959

(cylinder)
C₂H₂F₂ / CH₂=CF₂
Molecular mass: 64.04

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Extremely flammable. Explosive. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames, NO sparks, and NO smoking.	Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with powder, carbon dioxide.
EXPLOSION	Gas/air mixtures are explosive.	Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Use non-sparking handtools.	In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.

EXPOSURE
Inhalation		Ventilation.	Fresh air, rest.
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.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Personal protection: complete protective clothing including self-contained breathing apparatus.	UN Hazard Class: 2.1

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-20S1959 or 20G2F-9 NFPA Code: H1; F4; R2	Fireproof. Separated from incompatible materials. See Chemical Dangers. Store only if stabilized.

IMPORTANT DATA

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

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible, and may accumulate in low ceiling spaces causing deficiency of oxygen. As a result of flow, agitation, etc., electrostatic charges can be generated.

Chemical dangers
The substance can form explosive peroxides. The substance may polymerize releasing a large amount of heat, with fire or explosion hazard. Heating may cause violent combustion or explosion. The substance decomposes on heating or on burning producing toxic and corrosive fumes including hydrogen fluoride, fluorine and fluorides. Reacts violently with oxidants and many other materials, causing fire and explosion hazard.

Occupational exposure limits
TLV: 500 ppm as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK: Carcinogen category: 3B; (DFG 2005).

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
Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the central nervous system.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: -83°C Melting point: -144°C Relative density (water = 1): 0.6 Solubility in water: none Relative vapour density (air = 1): 2.2 Flash point: Flammable Gas Auto-ignition temperature: 640°C Explosive limits, vol% in air: 5.5-21.3 Octanol/water partition coefficient as log Pow: 1.24

NOTES

High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering area.
Vapours are uninhibited and may form polymers in the vents or flame arresters causing blockage.
Do NOT use in the vicinity of a fire or a hot surface, or during welding.
Check for peroxides prior to distillation; eliminate if found.
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
Halocarbon 1132A is a trade name.
Also consult ICSC 0083 Vinylidene chloride.
Card has been partly updated in October 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

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