1. This specification specifies the general requirements for disinfectant fluids of the coal-tar type. The fluids are designated black fluids, white fluids, modified black fluids and modified white fluids respectively, according to the composition as specified in Clause 2.
The standard covers six groups of black fluids and seven groups of white fluids, according to the germicidal value. Modified black and modified white fiuids are not divided into groups.