This standard specifies the requirements, sampling, test methods, inspection rules, marking, labeling, packaging, transportation and storage requirements for o-dichlorobenzene. This standard applies to o-dichlorobenzene produced by chlorination of benzene. This product is mainly used in the dye, pesticide, and pharmaceutical industries. Molecular formula: C|(6)H|(4)C|(2) Relative molecular mass: 147.01 (according to the 1995 international relative atomic mass)