This standard BS 4774:1972 Methods of test for chloroform for industrial use is classified in these ICS categories: 71.080.20 Halogenated hydrocarbons Determination of distillation characteristics, density at 20°C, residue on evaporation, water content, acidity and colour.
https://www.en-standard.eu/bs-4774-1972-methods-of-test-for-chloroform-for-industrial-use/
