Preservative Sodium Propionate

CAS.: 137-40-6,
Molecular weight: 96.06,
Molecular formula: C3H5O2Na.
Properties: Transparent granules or crystals, with a distinct odor. It deliquesces in humid air and is soluble in water, slightly soluble in alcohols. It is a salt substance in the acid-base salts category. Melting point: 285 - 286℃, water solubility: 995g/L (20℃).

Colorless transparent crystals or granular crystalline powder, with a slight special odor. The anhydrous salt is colorless crystals and has hygroscopic properties. It dissolves in water and ethanol, with a solubility of approximately 100 in 10% water at 15°C, and a pH value ranging from 8.5 to 10.5. It has a wide range of antibacterial effects against molds, yeasts, and bacteria, being most active at acidic pH levels. It is used as a food preservative, suitable for use as a preservative in pastries and as a bread anti-mildew agent. Sodium propionate has almost no toxicity to the human body. The dosage in food is the same as calcium propionate (based on propionic acid). The maximum allowable concentration in cosmetics is 2% (based on propionic acid). It is produced by neutralizing sodium hydroxide with propionic acid as the raw material.

1. Sodium propionate wet acid type preservative has its antibacterial effect influenced by the environmental pH. The minimum inhibitory concentration is 0.01% at pH 5.0 and 0.5% at pH 6.5. It has a strong inhibitory effect on various molds, aerobic spore-forming bacteria or Gram-negative bacteria in acidic media. It has a specific effect on preventing the production of aflatoxin, but is almost ineffective against yeast. In addition, it is also used as a food preservative.
2. In tanning, it is used as a binder to improve the leather's alkali resistance and the uniformity of tanning.
3. Sodium acid is also an acid-type food preservative, and its antibacterial effect is influenced by the environmental pH value. The minimum inhibitory concentration is 0.01% at pH 5.0 and 0.5% at pH 6.5. In acidic media, it has a strong inhibitory effect on various molds, Gram-negative bacteria or aerobic spore-forming bacteria. It has a specific effect on preventing the production of aflatoxin, but is almost ineffective against yeast. In the food industry, it can be used for the preservation of pastries, with a usage amount of 2.5g/kg (based on propionic acid, the same below); in a 3% to 5% aqueous solution, the maximum usage amount in pomelos is 50g/kg. It can also be used as a mold inhibitor for feed.
4. Food, feed, preservatives, and mold inhibitors. The general addition amount is 0.1-0.3%.
5. Cosmetic preservative. It has antibacterial effects against molds, yeast, and has a wide range of antibacterial effects. Its antibacterial effect is particularly obvious in acidic solutions. The addition amount in cosmetics is usually no more than 2%. Insecticide, mold inhibitor. Determine transaminase. In tanning, it is used as a binder to improve the leather's alkali resistance and the uniformity of tanning.

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