This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of by-product chloroform. This standard applies to the by-product chloroform used as raw material in the production of β-hydroxy-β-methylbutyrate calcium from sodium hyposodium and diacetone alcohol and recovered through distillation. Molecular formula: CHCl3. Relative molecular mass: 119.38 (according to the 2016 international relative atomic mass).