2,6-dichlorobenzoic acid 50-30-6 BENZOIC ACID,2,6-DICHLORO MFC7 H4 O2 CL2 InChI=1/C7H4Cl2O2/c8-4-2-1-3-5(9)6(4)7(10)11/h1-3H,(H,10,11 benzoic acid, 2,6-dichloro-