This standard BS 4122:1967 Specification for sodium chlorate is classified in these ICS categories:
71.100.80 Chemicals for purification of water
Two grades, 99 per cent and technical; requirements for chlorate content and matter insoluble in water for both grades; extra requirements for water content, acidity, sulphate, chloride and bromate contents and particle size for the 99 per cent grade; test methods in appendices.