This standard specifies the requirements, sampling, test methods, inspection rules and marking, packaging, transportation, storage, etc. of emulsifier S-80. This standard applies to sorbitan oleate produced by esterification of sorbitan and oleic acid, which is emulsifier S-80. This product is mainly used as a water-in-oil emulsifier and dispersant and is widely used in chemical, textile, machinery, petroleum, mining and other industries.