Propionic Acid appears as a clear colourless liquid with pungent odour. Propionic acid is a short-chain carboxylic acid that occurs naturally in cheese and other dairy products. It is used as a food and feed preservative to inhibit moulds and bacteria. It also serves as an intermediate for propionate salts, cellulose propionate, plasticisers, pharmaceuticals and herbicides. Packaging options include 200 kg steel drums, 1000 kg IBCs and ISO tanks. Food use as E 280 is subject to the applicable food-additive specification and permitted-use conditions. Use in biocidal products depends on the applicable product authorisation. Pharmaceutical use requires the applicable pharmacopoeia grade.