This standard specifies the basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage and quality commitment of the feed additive D-calcium pantothenate (vitamin B5). This standard applies to D-calcium pantothenate synthesized by chemical-enzymatic method. This product can be used in the field of feed additives. Chemical name: (R)-N-(3,3-dimethyl-2,4-dihydroxy-1-oxobutyl)-3-alanine calcium salt CAS No.:137-08-6 Molecular formula : C18H32CaN2O10 Relative molecular mass: 476.54 (according to the 2016 international relative atomic mass) Chemical structural formula: