2,5-dichlorobenzoic acid 50-79-3 BENZOIC ACID,2,5-DICHLORO InChI=1/C7H4Cl2O2/c8-4-1-2-6(9)5(3-4)7(10)11/h1-3H,(H,10,11 benzoic acid, 2,5-dichloro-