Properties: white crystalline granule or crystalline powder, microstrip propionic acid odor, heat and light stable, easy to absorb moisture, soluble in water under acidic conditions, the free propionic acid, has an antibacterial effect. 
 Executive standard: HG2921-1992 
 Application: Widely used preservative in bread, pastries, cheese and other solid food, feed industry, mildew and mineral additives. Japan provided the largest amount of *g/kg.