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DIMETHYLAMINE (aqueous solution)ICSC: 1485
Methanamine, N-methyl (aqueous solution)
DMA (aqueous solution)
June 2003
CAS #: 124-40-3
UN #: 1160
EC Number: 204-697-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  Vapour/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.  Use water in large amounts, alcohol-resistant foam, dry powder, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 AVOID ALL CONTACT!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Burning sensation. Cough. Headache. Sore throat. Laboured breathing. Shortness of breath.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
Skin Redness. Pain. Serious skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Blurred vision. Severe deep burns.  Wear face shield 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 Abdominal pain. Burning sensation. Shock or collapse.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Remove all ignition sources. Cover the spilled material with foam. Collect leaking and spilled liquid in covered containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 3; UN Subsidiary Risks: 8; UN Pack Group: II 

STORAGE
Fireproof. Cool. Separated from strong acids, oxidants, aluminium, copper, copper alloys, mercury, zinc and food and feedstuffs. Well closed. 
PACKAGING
Do not transport with food and feedstuffs. 
DIMETHYLAMINE (aqueous solution) ICSC: 1485
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
SOLUTION IN WATER WITH PUNGENT ODOUR. 

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

Chemical dangers
The solution in water is a strong base. It reacts violently with acid and is corrosive. Reacts violently with strong oxidants and mercury. This generates fire and explosion hazard. Attacks aluminium, copper, zinc alloys, galvanized surfaces and plastic. 

Formula: (CH3)2NH / C2H7N
Molecular mass: 45.1
Boiling point: 51°C
Melting point: -37°C
Relative density (water = 1): 0.9
Vapour pressure, kPa at 20°C: 26.3
Relative vapour density (air = 1): 1.6
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.14
Flash point: -18°C
Auto-ignition temperature: 400°C
Explosive limits, vol% in air: 2.8-14.4
Octanol/water partition coefficient as log Pow: -0.2
Viscosity: 3.4 mPa*s at 27°C 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Effects of short-term exposure
The substance is corrosive to the eyes and skin. The vapour is severely irritating to the respiratory tract. Corrosive on ingestion. 

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

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
Toxicity information applies to aqueous solutions containing dimethylamine over 15%, and physical properties will vary according to concentration.
Physical properties of this card are for the 40% solution.
See ICSC 0260 Dimethylamine gas in a cylinder. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F+, C; R: 12-20/22-34; S: (1/2)-3-16-26-29-36/37/39-45; Note: B 

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    See Also:
       Toxicological Abbreviations