ICSC 0419 - METHYL CHLORIDE

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METHYL CHLORIDE	ICSC: 0419 (June 2015)
Chloromethane Monochloromethane

CAS #: 74-87-3

UN #: 1063

EC Number: 200-817-4

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Heating will cause rise in pressure with risk of bursting. Gas/air mixtures are explosive.	NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools.	Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.

STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Staggering gait. Dizziness. Headache. Nausea. Vomiting. Convulsions. Unconsciousness. See Notes.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin	MAY BE ABSORBED! 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	See Skin.	Wear safety goggles, face shield or eye protection in combination with breathing protection.
Ingestion

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. NEVER direct water jet on liquid.	According to UN GHS Criteria Extremely flammable gas Contains gas under pressure; may explode if heated Suspected of damaging fertility or the unborn child May cause damage to central nervous system if inhaled May cause damage to central nervous system through prolonged or repeated exposure if inhaled Transportation UN Classification UN Hazard Class: 2.1
STORAGE
Fireproof. Ventilation along the floor.
PACKAGING

METHYL CHLORIDE

ICSC: 0419

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUEFIED GAS. Physical dangers The gas is heavier than air and may travel along the ground; distant ignition possible. The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. See Notes. Chemical dangers Decomposes on burning. This produces toxic and corrosive fumes including hydrogen chloride and phosgene. Reacts violently with powdered aluminium, powdered zinc, aluminium trichloride and ethylene. This generates fire and explosion hazard. Attacks many metals in the presence of moisture.	Formula: CH₃Cl Molecular mass: 50.5 Boiling point: -23.7°C Melting point: -97°C Relative density (water = 1): 0.91 Solubility in water, g/100ml at 25°C: 0.5 Vapour pressure, kPa at 25°C: 573 Relative vapour density (air = 1): 2.47 Flash point: Flammable gas Auto-ignition temperature: 632°C Explosive limits, vol% in air: 8.1-17.4 Octanol/water partition coefficient as log Pow: 0.91 Viscosity: 0.1834 cP at 20°C

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUEFIED GAS.

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible. The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. See Notes.

Chemical dangers
Decomposes on burning. This produces toxic and corrosive fumes including hydrogen chloride and phosgene. Reacts violently with powdered aluminium, powdered zinc, aluminium trichloride and ethylene. This generates fire and explosion hazard. Attacks many metals in the presence of moisture.

Formula: CH₃Cl
Molecular mass: 50.5
Boiling point: -23.7°C
Melting point: -97°C
Relative density (water = 1): 0.91
Solubility in water, g/100ml at 25°C: 0.5
Vapour pressure, kPa at 25°C: 573
Relative vapour density (air = 1): 2.47
Flash point: Flammable gas
Auto-ignition temperature: 632°C
Explosive limits, vol% in air: 8.1-17.4
Octanol/water partition coefficient as log Pow: 0.91
Viscosity: 0.1834 cP at 20°C

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation and through the skin. Effects of short-term exposure The liquid may cause frostbite. The substance may cause effects on the central nervous system. Exposure far above the OEL could cause liver, cardiovascular system and kidney damage. Exposure could cause unconsciousness. Medical observation is indicated. The effects may be delayed.	Inhalation risk A harmful concentration of this gas in the air will be reached very quickly on loss of containment. Effects of long-term or repeated exposure The substance may have effects on the central nervous system. This may result in effects measured using behavioural tests. Animal tests show that this substance possibly causes toxic effects upon human reproduction.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The liquid may cause frostbite. The substance may cause effects on the central nervous system. Exposure far above the OEL could cause liver, cardiovascular system and kidney damage. Exposure could cause unconsciousness. Medical observation is indicated. The effects may be delayed.

Inhalation risk
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

Effects of long-term or repeated exposure
The substance may have effects on the central nervous system. This may result in effects measured using behavioural tests. Animal tests show that this substance possibly causes toxic effects upon human reproduction.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 50 ppm as TWA; 100 ppm as STEL; (skin); A4 (not classifiable as a human carcinogen). MAK: 21 mg/m³, 10 ppm; peak limitation category: II(1); pregnancy risk group: D. EU-OEL: 42 mg/m³, 20 ppm as TWA

ENVIRONMENT

NOTES
Following intoxication patient should be observed carefully for 48 hours. Check oxygen content before entering area.

ADDITIONAL INFORMATION

EC Classification
Symbol: F+, Xn; R: 12-40-48/20; S: (2)-9-16-33

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