What is Propionic Acid (CAS 79-09-4)?
Propionic acid, also known as propanoic acid, is a short-chain saturated fatty acid with the chemical formula CH₃CH₂COOH and a molecular weight of 74.08. It is a weak electrolyte (Ka = 1.34 × 10⁻⁵), exhibiting weak acidity in aqueous solution but strong corrosiveness. At room temperature and atmospheric pressure, propionic acid is a colorless, clear oily liquid with a pungent, unpleasant odor. It is miscible with water and soluble in alcohol, chloroform, and ether.
what is Propionic Acid (CAS 79-09-4) used for?
Propionic acid is mainly used as a food preservative and antifungal agent. It can also serve as a viscosity inhibitor in beer and other products, a solvent and plasticizer for cellulose nitrate, and is used in the preparation of nickel-plating solutions, food flavorings, as well as in the manufacture of pharmaceuticals, pesticides, and antifungal agents.
Is propanoic acid powder (CAS 79-09-4) soluble in water?
Yes, propionic acid is highly soluble in water. As a colorless liquid, it has a density of 0.99 g/cm³ and a boiling point of 141°C under standard conditions.

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