RT Report T1 Trimellitic Anhydride Health and Safety Guide - Health and Safety Guide 71 A1 World Health Organization, K1 health K1 health hazard K1 chemical K1 chemical safety K1 occupational disease K1 occupational accident PB World Health Organization SN 92-4-151071-4 YR 1992 FD 1992 LK https://wedocs.unep.org/handle/20.500.11822/29600 UL https://wedocs.unep.org/handle/20.500.11822/29600 NO Trimellitic anhydride is a white solid in the firm of flakes. It is readily hydrolysed in water to trimellitic acid, which is moderately soluble in water. Trimellitic anhydride is readily soluble in acetone, cyclohexanone, 2-butane, ethyl acetate, and dimethyl formamide (from 49.6 to 15.5% wlw at 25 °C). DS UN Environment Document Repository RD Nov 4, 2026