Propionic acid is a colorless, clear liquid with a characteristic pungent odor. It is a short-chain carboxylic acid with the chemical formula C₃H₆O₂. Propionic acid is widely used as an intermediate and functional chemical in agriculture, food preservation, pharmaceuticals, and chemical manufacturing.

With its good miscibility with water and many organic solvents, propionic acid is an important raw material for producing various propionates and other chemical derivatives.

Basic Properties

• Product Name: Propionic Acid
• CAS No.: 79-09-4
• Chemical Formula: C₃H₆O₂
• Molecular Weight: 74.08 g/mol
• Appearance: Colorless, transparent liquid
• Odor: Pungent, characteristic odor
• Melting Point: Approximately -20.7°C
• Boiling Point: Approximately 141°C
• Density: Approximately 0.99 g/cm³ at 20°C
• Solubility: Miscible with water and soluble in many organic solvents
• Classification: Carboxylic acid

Applications of Propionic Acid

Propionic acid has a wide range of industrial applications.

1. Food and Feed Preservation

Propionic acid and its salts, such as calcium propionate and sodium propionate, are commonly used as preservatives. They help inhibit the growth of mold and certain microorganisms, particularly in animal feed and bakery products.

2. Agriculture and Animal Feed

Propionic acid is used in feed preservation and agricultural applications. It can help control mold growth and extend the storage life of grains and feed materials.

3. Chemical Manufacturing

Propionic acid is an important intermediate for the production of propionates, esters, and other chemical derivatives. These derivatives are used in solvents, coatings, fragrances, and various industrial formulations.

4. Pharmaceutical Industry

Propionic acid is used as a chemical intermediate in the synthesis of certain pharmaceutical compounds and other specialty chemicals.

5. Industrial Applications

Because of its chemical reactivity and compatibility with various processes, propionic acid can be used in the manufacture of plastics, coatings, rubber chemicals, and other specialty products.

Packaging and Storage

Propionic acid should be stored in a cool, dry, and well-ventilated area, away from heat, ignition sources, and incompatible materials. Containers should remain tightly closed when not in use.

For transportation and storage, suitable chemical-resistant packaging should be selected according to the product grade, concentration, and applicable regulations.

Conclusion

Propionic acid CAS No. 79-09-4 is an important industrial carboxylic acid with applications across food and feed preservation, agriculture, pharmaceuticals, and chemical manufacturing. Its versatile chemical properties make it a valuable raw material for a wide range of downstream products.