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Trimellitic anhydride

Trimellitic anhydride

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Chemical Name:

Trimellitic anhydride

CAS number:

552-30-7

EINECS number:

209-008-0

Molecular formula:

Molecular weight:

192.12

Molecular Structure:



The main purpose:


Trimellitic anhydride, namely 1,2,4-benzenetricarboxylic anhydride, mainly used in unsaturated polyester resin, polyimide resin, water-soluble polyester resin, water-soluble polyurethane resin, water-soluble amino alkyd resin, trimellitic acid Products such as octyl ester (TOTM) and epoxy resin curing agent can also be used as advanced aviation lubricating oil, power capacitor immersion oil, pellet binder, sizing agent, smoke suppressant, and instant binder.


Technical indicators(GB/T23967-2017)

Project Indicator
Superior product Qualified product
Exterior White or microstrip color solid
Trimellitic anhydride,w/% ≥96.5 ≥95.0
Phthalic anhydride,w/% ≤0.05 ≤0.10
Acid value (in KOH)/(mg/g) ≥873 ≥865
Molten color / Hazen unit (platinum-cobalt color number) ≤130 ≤150
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