ICSC 0260 - DIMETHYLAMINE

DIMETHYLAMINE	ICSC: 0260 (November 2019)
Methanamine, N-methyl DMA

CAS #: 124-40-3

UN #: 1032

EC Number: 204-697-4

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire. Cylinder may explode in heat of fire. Gas/air mixtures are explosive. Risk of fire and explosion on contact with strong oxidizing agents.	NO open flames, NO sparks and NO smoking. NO contact with strong oxidizing agents or mercury. 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	Sore throat. Cough. Burning sensation in the throat and chest. Shortness of breath.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention.
Skin	ON CONTACT WITH LIQUID: FROSTBITE. Redness. Pain.	Cold-insulating gloves. Protective clothing.	Wear protective gloves when administering first aid. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer immediately for medical attention.
Eyes	Redness. Pain. Blurred vision. Severe burns. ON CONTACT WITH GAS: FROSTBITE.	Wear face shield or eye protection in combination with breathing protection.	Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer immediately for medical attention.
Ingestion		Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Remove all ignition sources. Shut off cylinder if possible. Ventilation. Remove gas with fine water spray. Isolate the area until the gas has dispersed. If liquid: Do NOT let this chemical enter the environment. Do NOT wash away into sewer.	According to UN GHS Criteria DANGER Extremely flammable gas Contains gas under pressure; may explode if heated Harmful if inhaled Causes skin irritation Causes serious eye damage May cause an allergic skin reaction May cause respiratory irritation Harmful to aquatic life Transportation UN Classification UN Hazard Class: 2.1
STORAGE
Cool. Fireproof. Separated from : see Chemical Dangers. Store in an area without drain or sewer access.
PACKAGING

DIMETHYLAMINE

ICSC: 0260

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS COMPRESSED LIQUEFIED GAS WITH PUNGENT ODOUR. Physical dangers The gas is heavier than air and may travel along the ground; distant ignition possible. Chemical dangers Decomposes on burning. This produces toxic fumes including nitrogen oxides. Reacts violently with strong oxidants and mercury. This generates fire and explosion hazard. Attacks copper, zinc alloys, aluminium, galvanized surfaces and plastics. The solution in water is a strong base. It reacts violently with acid and is corrosive (see ICSC 1485 dimethylamine, aqueous solution).	Formula: (CH₃)₂NH / C₂H₇N Molecular mass: 45.1 Boiling point: 7.0°C Melting point: -92.2°C Relative density (water = 1): 0.7 Solubility in water, g/100ml: 354 (very soluble) Vapour pressure, kPa at 25°C: 203 Relative vapour density (air = 1): 1.6 Auto-ignition temperature: 400°C Explosive limits, vol% in air: 2.8-14.4 Octanol/water partition coefficient as log Pow: -0.2 Critical temperature: 164.6°C

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS COMPRESSED LIQUEFIED GAS WITH PUNGENT ODOUR.

Physical dangers
The gas is heavier than air and may travel along the ground; distant ignition possible.

Chemical dangers
Decomposes on burning. This produces toxic fumes including nitrogen oxides. Reacts violently with strong oxidants and mercury. This generates fire and explosion hazard. Attacks copper, zinc alloys, aluminium, galvanized surfaces and plastics. The solution in water is a strong base. It reacts violently with acid and is corrosive (see ICSC 1485 dimethylamine, aqueous solution).

Formula: (CH₃)₂NH / C₂H₇N
Molecular mass: 45.1
Boiling point: 7.0°C
Melting point: -92.2°C
Relative density (water = 1): 0.7
Solubility in water, g/100ml: 354 (very soluble)
Vapour pressure, kPa at 25°C: 203
Relative vapour density (air = 1): 1.6
Auto-ignition temperature: 400°C
Explosive limits, vol% in air: 2.8-14.4
Octanol/water partition coefficient as log Pow: -0.2
Critical temperature: 164.6°C

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure The substance is corrosive to the eyes. The substance is irritating to the respiratory tract and skin. Exposure could cause visual disturbances. Inhalation of high levels may cause lung oedema. See Notes. Rapid evaporation of the liquid may cause frostbite.	Inhalation risk On loss of containment, a harmful concentration of this gas in the air will be reached very quickly, especially in confined spaces. Effects of long-term or repeated exposure Repeated or prolonged contact may cause skin sensitization.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is corrosive to the eyes. The substance is irritating to the respiratory tract and skin. Exposure could cause visual disturbances. Inhalation of high levels may cause lung oedema. See Notes. Rapid evaporation of the liquid may cause frostbite.

Inhalation risk
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly, especially in confined spaces.

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 ppm as TWA; 15 ppm as STEL; (DSEN); A4 (not classifiable as a human carcinogen). MAK: 3.7 mg/m³, 2 ppm; peak limitation category: I(2); pregnancy risk group: D. EU-OEL: 3.8 mg/m³, 2 ppm as TWA; 9.4 mg/m³, 5 ppm as STEL

ENVIRONMENT
The substance is harmful to aquatic organisms.

NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. See ICSC 1485.

ADDITIONAL INFORMATION

EC Classification

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    See Also:
       Toxicological Abbreviations