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METHYLAMINE (40% aqueous solution)
ICSC: 1483
Peer-Review Status: 05.05.2003 Validated
Methanamine
Aminomethane
Monomethylamine 
CAS #: 74-89-5 RTECS #: PF6300000
UN #: 1235
EC #: 612-001-01-6
EINECS #: 200-820-0
    Formula: CH5N / CH3NH2
Molecular mass: 31.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking.  Use water spray, alcohol-resistant foam, dry powder, carbon dioxide. 
EXPLOSION Vapour/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   AVOID ALL CONTACT!   
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.  Rinse skin with plenty of water or shower. Refer for medical attention . Remove contaminated clothes. 
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
PACKAGING & LABELLING
Evacuate danger area! Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Remove all ignition sources. Collect leaking and spilled liquid in covered containers as far as possible. Cautiously neutralize remainder with with dilute acid. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: F+, C; R: 12-20/22-34; S: (2)-3-16-26-29-36/37/39-45; Note: B 
UN Classification
UN Hazard Class: 3; UN Subsidiary Risks: 8; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30GFC-II.
NFPA Code: H3; F4; R0. 
Fireproof. Cool. Well closed. Separated from food and feedstuffs, strong acids, oxidants, aluminium, copper, zinc, zinc alloys and mercury. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS SOLUTION IN WATER WITH PUNGENT ODOUR. 

Physical dangers
The vapour mixes well with air, explosive mixtures are easily formed. 

Chemical dangers
Reacts violently with mercury compounds. This generates fire and explosion hazard. The substance is a medium strong base. Attacks plastics, rubber, copper, aluminium, zinc alloys and galvanized surfaces. 

Occupational exposure limits
TLV: 5 ppm as TWA; 15 ppm as STEL; (ACGIH 2008).
MAK: 10 ppm, 13 mg/m³; Peak limitation category: I(1); Pregnancy risk group: D; (DFG 2008). 

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

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

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. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 48°C
Melting point: -39°C
Relative density (water = 1): 0.89
Vapour pressure, kPa at 20°C: 31
Relative vapour density (air = 1): 1.08
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02
Flash point: -10°C
Auto-ignition temperature: 430°C
Explosive limits, vol% in air: 4.9-20.8
Octanol/water partition coefficient as log Pow: -0.6  
 

NOTES
See ICSC 0178 Methylamine gas in a cylinder.
Card has been partially updated in February 2009: see Occupational Exposure Limits, Ingestion First Aid. 

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
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations