TRIMELLITIC ANHYDRIDE- ▸ Plasticizers: Feedstock for trimellitate (high-temperature) PVC plasticizers
- ▸ Epoxy curing: Curing agent for epoxy resins
- ▸ High-performance resins: Monomer for poly(amide-imide) and poly(ester-imide) polymers
- ▸ Coatings and inks: Intermediate for alkyd coating resins, dyes, and printing inks
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Trimellitic anhydride (CAS 552-30-7, C9H4O5) is the cyclic anhydride of benzene-1,2,4-tricarboxylic acid. It is used mainly to make trimellitate plasticizers for PVC and as a curing agent for epoxy resins, and as a building block for poly(amide-imide) and poly(ester-imide) resins, alkyd coatings, dyes, and printing inks.
Frequently Asked Questions
What is trimellitic anhydride used for?
Trimellitic anhydride (TMA, CAS 552-30-7) is used mainly as the feedstock for trimellitate plasticizers, the high-temperature plasticizers used in PVC. It also serves as a curing agent for epoxy resins and as a monomer for poly(amide-imide) and poly(ester-imide) high-performance resins, plus alkyd coating resins, dyes, and printing inks.
What is trimellitic anhydride made from?
It is the cyclic anhydride of benzene-1,2,4-tricarboxylic acid (trimellitic acid), with molecular formula C9H4O5. Industrially it is produced by the catalytic air oxidation of pseudocumene (1,2,4-trimethylbenzene) followed by dehydration to the anhydride.
Who manufactures trimellitic anhydride and where can I source it in bulk?
TMA is produced by several specialty-chemical manufacturers worldwide. RawSource supplies it as a sourcing partner in bulk industrial quantities; request a quote for current packaging, lead time, and CoA/SDS documentation.
What is the CAS number and molecular weight of trimellitic anhydride?
The CAS number is 552-30-7 and the molecular formula is C9H4O5, giving a molecular weight of approximately 192.1 g/mol. It is commonly abbreviated TMA in plasticizer and resin specifications.
What is the HS code for importing trimellitic anhydride?
Trimellitic anhydride is generally classified under HS 2917.39 (aromatic polycarboxylic acids, their anhydrides and derivatives, other). Confirm the final classification with your customs broker against the as-shipped form and country of import.