Whitish to beige powder or flakes

Trimellitic Acid Cyclic 1,2-anhydride
Anhydro trimellitic acid
1,2,4-benzenetricarboxylic acid cyclic 1,2-anhydride
1,2,4-Benzenetricarboxylic anhydride
4-carboxyphthalic anhydride
1,3-dioxo-5-phthalancarboxylic acid
5-phthalancarboxylic acid

552-30-7
Benzene-1,2,4-tricarboxylic acid 1,2-anhydride
209-008-0
GHS05 - H318 Causes serious eye damage
GHS07 - H317 May cause an allergic skin reaction
GHS07 - H335 May cause respiratory irritation
GHS08 - H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled