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DIMETHYLAMINE
(cylinder)
ICSC: 0260
Peer-Review Status: 05.06.2003 Validated
Methanamine, N-methyl
DMA 
CAS #: 124-40-3 RTECS #: IP8750000
UN #: 1032
EC #: 612-001-00-9
EINECS #: 204-697-4
    Formula: (CH3)2NH / C2H7N
Molecular mass: 45.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Extremely flammable. 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 water spray, alcohol-resistant foam, dry powder, carbon dioxide. 
EXPLOSION Gas/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools.  In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. 
 
EXPOSURE   STRICT HYGIENE!   
Inhalation Burning sensation. Cough. Headache. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
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 Redness. Pain. Blurred vision.  Wear safety goggles 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   Do not eat, drink, or smoke during work.   

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Remove all ignition sources. NEVER direct water jet on liquid. Remove gas with fine water spray. Do NOT let this chemical enter the environment.   
EC Classification
Symbol: F+, Xn; R: 12-20-37/38-41; S: (2)-16-26-39 
UN Classification
UN Hazard Class: 2.1 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-20S1032.
NFPA Code: H3; F4; R0. 
Fireproof. Cool. 

IMPORTANT DATA
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). 

Occupational exposure limits
TLV: 5 ppm as TWA; 15 ppm as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2003). 

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

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 short-term exposure
The substance is severely irritating to the eyes and respiratory tract. Inhalation of of high levels may cause lung oedema. See Notes. The effects may be delayed. Medical observation is indicated. Rapid evaporation of the liquid may cause frostbite. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 7.0°C
Melting point: -92.2°C
Relative density (water = 1): 0.7
Solubility in water, g/100ml: 354
Vapour pressure, kPa at 25°C: 203
Relative vapour density (air = 1): 1.6
Flash point: Flammable gas
Auto-ignition temperature: 400°C
Explosive limits, vol% in air: 2.8-14.4
Octanol/water partition coefficient as log Pow: -0.2  
The substance is harmful to aquatic organisms. 

NOTES
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
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 is therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
Do NOT spray water on leaking cylinder (to prevent corrosion of cylinder).
See ICSC 1485 Dimethylamine, aqueous solution. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
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    See Also:
       Toxicological Abbreviations