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DIMETHYLAMINEICSC: 0260
June 2003
CAS #: 124-40-3Methanamine, N-methyl
DMA
UN #: 1032
EINECS #: 204-697-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire.  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, alcohol-resistant foam, dry powder, carbon dioxide.  In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position. 

 STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 2.1 

STORAGE
Fireproof. Cool. 
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
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  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract. Inhalation 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. 

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
 


Occupational exposure limits
TLV: 5 ppm as TWA; 15 ppm as STEL; (SEN); 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
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 are 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. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F+, Xn; R: 12-20-37/38-41; S: (2)-16-26-39 

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    See Also:
       Toxicological Abbreviations