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General information

Monomethylamine is a basic alkylamine and is a primary amine in its simplest form. It is a colorless gas co-produced with dimethylamine (DMA) and trimethylamine (TMA). It has a strong fishy odor. It is used as a building block for the synthesis of many other commercial compounds. It is used to produce a variety of chemical derivatives such as N-methyl-2-pyrrolidone (NMP), Monomethylethanolamine (MMEA), Methyldiethanolamine (MDEA), Metam sodium, Triazines, etc. Monomethylamine is usually sold as an anhydrous gas in pressurized containers or as solution in water.

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Variants

  • MMA Anhydrous
  • MMA 40%
  • MMA 45%
  • MMA 50%

Properties

Appearance

It is available as anhydrous (liquified gas under pressure) & 40%, 45% & 50% solution. Clear, colorless liquid with strong ammoniacal odor.

Physical Properties

Empirical FormulaCH5N
Structural FormulaCH3NH2
Molecular Wt.31.06
Sp. Gr. at 20ºCFor Anhydrous
0.65-0.66		 For 40% Soln.
0.89-0.90		 For 45% Soln.
0.89-0.90
Boiling Point-6.3°C48°C44°C
Freezing Pointbelow -80°Cbelow -30°Cbelow -30°C
Solubility in waterSolubleSolubleSoluble
Flash Point (closed cup)-below -18°Cbelow -18°C

Specifications

ContentUnitAnhydrous40% solution45% Solution50% Solution
MMA%99.50 min.40.00 min.45.00 min.50.00 min.
Water%00.20 max.60.00 max.55.00 max.50.00 max.
Ammonia%00.05 max.00.03 max.0.03 max.0.03 max.
Other Amines / NOI%00.30 max.00.20 max.00.20 max.00.20 max.
  • IMDG ClassMMA (Anhydrous) Class 2
    MMA (Solution) Class 3
  • UN Code No.MMA (Anhydrous) 1061
    MMA (Solution) 1235
  • HSN Code:2921.19.90
  • CAS No.74-89-5

Applications

  • applications
    Agro-Chemical

    As a raw material for the manufacture of systemic insecticides like Dimethoate, Carbaryl, and Carbofuron and fungicides like Sodium N-Methyl Dithiocarbamate and as a raw material to manufacture Monomethylacetoacetamide.

  • applications
    Dyestuff

    Used in the manufacture of dyestuff intermediates like N-Methyl Aniline, N-Methyl J Acid, Sarcosine, and Anthraquinone derivatives.

  • applications
    Mining

    As a raw material to manufacture explosive boosters like Tetryl-Unsymmetrical Dimethyl-hydrazine and explosive sensitizers like Monomethylamine Nitrate.

  • applications
    Natural Gas Treatment

    Methyldiethanolamine manufactured using MMA is used as a selective absorbent for H2S gas during purification of petrochemicals in refineries.

  • applications
    Rocket Fuel

    In manufacturing Monomethyl Hydrazine which is one of the ingredients of rocket fuel.

  • applications
    Pharmaceuticals

    As an intermediate or catalytic agent for drugs like Adrenaline, Ephedrine and Pethidine. Vasodilators like Theophylline and Caffeine are manufactured from Dimethyl Urea derived from MMA.

  • applications
    Water Treatment

    For manufacturing resins.

Storage

  • MMA (anhydrous) should be stored in a suitably designed pressure vessel. MMA solution drums should be stored in a cool, well-ventilated area away from sources of ignition. Avoid contact with copper and its alloys. Store in tightly closed containers in a cool, well-ventilated area away from heat.

Health & Safety

  • Monomethylamine is irritating to the skin, eyes, and mucous membrane. In case of contact, the affected area is to be washed with plenty of water at least for 15 minutes.
  • In case of inhalation, the victim should be moved to fresh air and oxygen should be administered. In case of ingestion, the victim should be made to consume a copious quantity of milk and water. Medical advice should be sought at once.
  • Personal protective equipment should always be used while handling.

Disclaimer

All data, statements and recommendations contained in this publication are based upon the information available and are believed to be reliable. However, all such data, statements and recommendations are given gratis and Alkyl Amines Chemicals Ltd. assumes no obligation or liability, and makes no warranty, either express or implied, with regard to the data, statements and recommendations given or the application of the products covered in this publication, or the results obtained; all such data, statements and recommendations being given and accepted at the user's risk. Nothing printed in this publication is to be construed as permission, or a recommendation, to practice any patented invention without a license.

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