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Abbreviation t-MA
Plant Niigata
Main Applications Crosslinkerst for resin, pharmaceuticals, agricultural chemicals, ion-exchange resin, choline chloride
Existing Chemical Substance No. (2)-140


  100%t-MA 30%t-MA
Chemical Formula (CH3)3N
Molecular Weight 59.11
Appearance Colorless gas (under room temperature & atomospheric pressure) Colorless transparent liquid (liquified under pressure) Colorless transparent liquid
Odor Ammonia smell
Specific Gravity (liquid 20℃/4℃) 0.64 0.916
Boiling Point (℃ 760mmHg) 2.87 32.0
Freezing Point (℃ 760mmHg) -117.1 6
Flash Point (℃ Tagliabue (Tag) Closed Cup) -12 -19.3
Ignition Temperature (℃) 190 No data
Flammability Limits (vol%) 2.0-11.6 2.0-11.6
Vapour Pressure (mmHg 20℃) 1420 368
Viscosity (CP 25℃) 0.177 No data
Solubility 19.0wt% (40℃ 1atm) in water Readily soluble in water
Decompose into toxic gas (nitrous oxide) when burnt. Water solution shows strong basicity; reacts violently with acid and corrodes aluminum, copper and zinc. Reacts violently with many compounds such as oxidants and mercury to generate impact-sensitive compounds. Reacts with nitrite and nitric acid to generate very toxic nitrosoamine under a special conditions.

Applicable Laws

  100%t-MA 30%t-MA
Industrial Safety and Health Law Flammable Gas, Chemical Facilities Inflammable substances, chemical facilities
High Pressure Gas High Pressure Gas, Liquefied Gas, Flammable Gas, Toxic Gas
Fire Service Law Class 4 Petroleum No.1Water soluble
Poisonous and Deleterious Substances Control Law
Law on the Prevention of Marine Pollution and Maritime Disaster Hazardous fluid class C
Ship Safety Law High Pressure Gas Inflammable liquids
Civil Aeronautics Law High Pressure Gas Inflammable liquid
Other Major Applicable Laws Malodor Prevention Law (malodorous substance)

Classification of Hazard

  100%t-MA 30%t-MA
Classification High Pressure Gas, Flammable Gas, Acute Toxicity Materials Inflammable liquid
Hazardous High pressure liquefied gas and inflammable Inflammable liquid

Severely irritates the skin and the mucosa upon contact; may cause chemical burns; repeated exposure may cause CNS disorder, headaches, anaemia, elevation of blood pressure, agitation, etc.

Inhalation in high concentrations (vapour density 30%) may cause edema of the lungs.

Product Standard

  100%t-MA 30%t-MA
Monomethylamine (%) 0.2 or less 0.1 or less
Dimethylamine (%) 0.8 or less 0.3 or less
Trimethylamine (%) No less than 98.5 30.0-320.
Ammonia (%) 0.0 or less
Water Content (%) 1.0 or less

Inquiries Concerning Products

Natural Gas Chemicals Company
Organic Chemicals Division
Sales & Marketing Department I
TEL:+81-3-3283-4788 / FAX:+81-3-3214-0930