This standard specifies the basic requirements, technical requirements, test methods, inspection rules, labeling, packaging, transportation and storage, quality commitment, etc. of the feed additive cantharidin particles. This standard is applicable to the chemically synthesized feed additive cantharidin using β-carotene or 15-carbon aldehyde as the starting raw material, with an appropriate amount of antioxidants and auxiliary materials, and using liquid phase ultra-microemulsification and starch flow instant molding. The feed additive cantharidin particles are manufactured by double-layer encapsulation technology (the cantharidin content is not less than 10%). Molecular formula: C40H52O2 Relative molecular weight: 564.8 Structural formula: