This standard specifies the requirements, test methods, inspection rules, labels, packaging, transportation, storage and shelf life of feed additive niacin products. This standard applies to the feed additive niacin produced by chemical synthesis. Chemical name: ————Pyridine-3-carboxylic acid Structural formula: N|SSCOOH Molecular formula: CeH; NO, relative molecular mass: 123.11 (based on Cv, H; NO, calculated according to the international relative atomic mass in 2007)