ICSC 0354 - DIBROMOMETHANE

DIBROMOMETHANE	ICSC: 0354 (April 2013)
Methylene bromide Methylene dibromide

CAS #: 74-95-3

UN #: 2664

EC Number: 200-824-2

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. Heating will cause rise in pressure with risk of bursting. Risk of fire and explosion. See Chemical Dangers.	See Chemical Dangers	In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep drums, etc., cool by spraying with water.

PREVENT GENERATION OF MISTS! STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Dizziness. Drowsiness. Headache. Nausea. Weakness. Unconsciousness.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Administration of oxygen may be needed. Artificial respiration may be needed. Refer for medical attention.
Skin	Dry skin. Redness.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness.	Wear safety spectacles or eye protection in combination with breathing protection.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion	See Inhalation.	Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.	According to UN GHS Criteria WARNING Harmful if swallowed or if inhaled Causes skin and eye irritation May cause damage to central nervous system, blood and cardiovascular system May cause drowsiness or dizziness May cause damage to central nervous system, liver, kidneys and lungs through prolonged or repeated exposure May be harmful if swallowed and enters airways May cause long lasting harmful effects to aquatic life Transportation UN Classification UN Hazard Class: 6.1; UN Pack Group: III
STORAGE
Separated from food and feedstuffs, strong oxidants, strong bases and metals. Do NOT store or transport in containers made from aluminium or plastic. Ventilation along the floor.
PACKAGING
Do not transport with food and feedstuffs.

DIBROMOMETHANE

ICSC: 0354

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID. Physical dangers The vapour is heavier than air. Chemical dangers Decomposes on heating. This produces toxic and corrosive fumes including hydrogen bromide and carbon monoxide (see ICSC 0023). Reacts violently with strong oxidants, strong bases and some metals such as aluminium, magnesium and potassium. This generates fire and explosion hazard. Attacks some forms of plastic, rubber and coatings.	Formula: CH₂Br₂ Molecular mass: 173.8 Boiling point: 97°C Melting point: -52.7°C Relative density (water = 1): 2.5 Solubility in water, g/100ml at 15°C: 1.2 (moderate) Vapour pressure, kPa at 20°C: 4.7 Relative vapour density (air = 1): 6.0 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2 Octanol/water partition coefficient as log Pow: 1.88 (estimated) Viscosity: 0.39 mm²/s at 25°C Auto-ignition temperature: 515°C

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID.

Physical dangers
The vapour is heavier than air.

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including hydrogen bromide and carbon monoxide (see ICSC 0023). Reacts violently with strong oxidants, strong bases and some metals such as aluminium, magnesium and potassium. This generates fire and explosion hazard. Attacks some forms of plastic, rubber and coatings.

Formula: CH₂Br₂
Molecular mass: 173.8
Boiling point: 97°C
Melting point: -52.7°C
Relative density (water = 1): 2.5
Solubility in water, g/100ml at 15°C: 1.2 (moderate)
Vapour pressure, kPa at 20°C: 4.7
Relative vapour density (air = 1): 6.0
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2
Octanol/water partition coefficient as log Pow: 1.88 (estimated)
Viscosity: 0.39 mm²/s at 25°C
Auto-ignition temperature: 515°C

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation, by ingestion and through the skin. Effects of short-term exposure The substance is mildly irritating to the eyes, skin and respiratory tract. If swallowed the substance may cause vomiting and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system, blood and heart. Exposure could cause carbon monoxide poisoning. This may result in impaired functions. The effects may be delayed. Exposure at high concentrations could cause unconsciousness or death.	Inhalation risk A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the central nervous system, liver, kidneys and lungs.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is mildly irritating to the eyes, skin and respiratory tract. If swallowed the substance may cause vomiting and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system, blood and heart. Exposure could cause carbon monoxide poisoning. This may result in impaired functions. The effects may be delayed. Exposure at high concentrations could cause unconsciousness or death.

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the central nervous system, liver, kidneys and lungs.

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT
The substance is harmful to aquatic organisms. The substance may cause long-term effects in the aquatic environment.

NOTES
Do NOT use in the vicinity of a fire or a hot surface, or during welding.

ADDITIONAL INFORMATION

EC Classification
Symbol: Xn; R: 20-52/53; S: (2)-24-61

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    See Also:
       Toxicological Abbreviations