What Is the Formula of Propanoic Acid?
The formula of propanoic acid is C₃H₆O₂, often written structurally as CH₃CH₂COOH.
Propanoic acid is also widely known as propionic acid.
Chemical formula: C₃H₆O₂
Molecular weight: 74.08 g/mol
CAS number: 79-09-4
Understanding the Propionic Acid Formula
The propionic acid molecular formula (C₃H₆O₂) indicates that the compound consists of:
- 3 carbon atoms (C)
- 6 hydrogen atoms (H)
- 2 oxygen atoms (O)
Is propanoic acid a strong acid?
Propanoic acid, like most organic acids, is a weak acid. Its Ka value 1.3*10^-5 mol/L. It doesn't dissociate well into its respective ions and it is reluctant to donate its proton.
What is propanoic acid used for?
Food Industry (E280):
- Preservative in baked goods, animal feed, dairy products
- Inhibits mold/bacteria in cheese, bread, poultry feed
Agriculture:
- Herbicide intermediate (propionic acid esters)
- Grain preservative (prevents spoilage during storage)
Chemical Manufacturing:
- Production of cellulose-based plastics (e.g., propionates)
- Synthesis of pharmaceuticals, fragrances, solvents
Other Uses:
- Antifungal agent in cosmetics
- Rubber coagulant in latex processing
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