Synonyms: 1,4-Benzenedicarboxylicacid, 2,3,5,6-tetrachloro-, monomethyl ester (9CI); Terephthalic acid,tetrachloro-, methyl ester (7CI); Terephthalic acid, tetrachloro-, monomethylester (8CI); Chlorthal monomethyl; Dacthal monoacid; Methyl2,3,5,6-tetrachloroterephthalate; Monomethyl 2,3,5,6-tetrachloroterephthalate;Monomethyl tetrachloroterephthalate; Tetrachloroterephthalic acid methyl ester