This standard specifies the technical indicators, test methods, inspection rules and requirements for labeling, packaging, transportation, storage and shelf life of the feed additive propionic acid. This standard applies to propionic acid products refined by industrial synthesis, or powder products with propionic acid as the main component and vermiculite, corncob powder or perlite as the carrier. Chemical molecular formula: C3H6O2 Relative molecular mass: 74.08 (based on C3H6O2, according to 2005 International Relative Atomic Mass Table Calculation)