1,4-Benzenedicarboxylic acid, 2,3,5,6-tetrachloro- 2,3,5,6-TETRACHLOROTEREPHTHALIC ACID 2,3,5,6-Tetrachloro-1,4-benzenedicarboxylic acid 2136-79-0 3-09-00-04257 (Beilstein Handbook Reference) AI3-33410 BRN 1887098 Caswell No. 833A Chlorthal Chlorthal (VAN) Chlorthal [ISO] NSC 12443 Perchloroterephthalic acid Terephthalic acid, tetrachloro- Terephthalic acid, tetrachloro- (8CI) Tetrachloroterephthalic acid