Trimellitic anhydride (TMA)

Trimellitic anhydride is a chemical compound produced from the reaction of trimellitic acid with a dehydrating substance. Trimelitic anhydride is primarily used as a monomer to produce heat-resistant polymers. It is an important component in the synthesis of polyimides, especially polyimides with high temperature resistance. Polyimides made from trimelitic anhydride exhibit high thermal stability, mechanical strength and chemical resistance. Therefore, they find applications in various areas of paint, and coatings in electronics, aerospace, automotive and other high temperature applications.


  • benzene-1,2,4-tricarboxylic acid 1,2-anhydride

General information:

Abbreviation TMA
CAS number 552-30-7
EC no: 209-008-0
REACH Registration No. 01-2119489422-34
MATSEN Article no. 1700
Sum formula: C9H4O5
Description white flakes
Available packaging 25 kg bags, various types of big bags
Variants flakes
Aggregate state solid
Form flakes
Colour white
Odour characteristic
Purity ≥98.0% m/m
Boiling point 390 °C
Melting point 167.2°C


Safety data sheet and specifications