Sodium Propionate, E281, CAS no.137-40-6, a white crystalline solid or powder that is the sodium salt of propionic acid. Sodium Propionate manufacturing process via chemical synthesis of propionic acid and sodium carbonate or sodium hydroxide as raw materials. Sodium Propionate is used in the food and beverage industry as a preservative. It prevents the growth of mold and some bacteria, thereby prolonging the shelf life of packaged baked goods. Used as a mold inhibitor in bakery products, such as breads, yogurts, soups, drinking yogurts, canned vegetables, etc.

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Sodium Propionate powder Specification
Product Sodium Propionate
CAS 137-40-6 INS 281
Structure Molecular formula C3H5NaO2
Properties White crystals, particles or crystalline powder;Odorless or slightly ethyl butyrate smell.1g of this
product can be dissolved in 1ml of water,25 or 24 ml of ethanol.
Quality
Specification Standard Item GB25549-2010 BP2012 FCCV USP35 EP7.0
Content dry
basis 99.0%~100.5% 99.0%~101% 99.0%~100.5% 99.0%~100.5% 99.0%~101%
Loss on drying
(Vol. 4) 1.0% 0.5% 1.0% 1.0% 0.5%
Water-insoluble
matter Clear, olorless Clear, olorless
PH 10 7.8~9.2 7.8~9.2
As(as As203) 3 mg/kg
Heavy metals
(as Pb) 4 mg/kg 10ppm 2 mg/kg 0.001% 10ppm
Fe 0.003% 10ppm 0.003%10ppm
Alkalinity
(Na2CO3) passed test 0.15% passed test