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Propionic acid Core Application Areas
(1) Feed Preservation: This is the largest market for propionic acid. Adding 0.1%-0.3% propionic acid or its salts to compound feed or silage effectively inhibits mold growth and extends shelf life. In one case study of a large livestock farm, adding calcium propionate reduced feed mold rates by over 85% during the humid southern season.
(2) Food Preservation: Calcium propionate and sodium propionate are widely used in baked goods (bread, pastries) and dairy products to prevent “ropey spoilage” caused by molds and spore-forming bacteria. According to China’s Food Additive Use Standards, the maximum usage in pastries is 2.5 g/kg (calculated as propionic acid).
(3) Industrial Applications: Propionic acid is a key raw material for producing propionate esters, cellulose propionate, herbicides (e.g., propisochlor), and pharmaceutical intermediates. For example, the propionic acid derivative ibuprofen is a common non-steroidal anti-inflammatory drug (NSAID).