Potassium bisulfite

Potassium bisulfite

Structural formula of potassium bisulfite

Potassium bisulfite is a chemical compound with the formula KHSO_. It is a white crystalline powder that is soluble in water and is commonly used as a food preservative and in winemaking.

Chemical Properties

Potassium bisulfite is an acidic salt of potassium and sulfurous acid. It is formed by the reaction of potassium hydroxide with sulfur dioxide. The compound is known for its ability to release sulfur dioxide, which acts as a preservative by inhibiting the growth of bacteria and fungi.

Uses

Food Preservation

Potassium bisulfite is widely used in the food industry as a preservative. It helps to prevent spoilage and discoloration in various food products, including dried fruits and vegetables. The compound works by releasing sulfur dioxide, which acts as an antimicrobial agent.

Winemaking

In winemaking, potassium bisulfite is used to prevent oxidation and to preserve the flavor and color of the wine. It is added during the fermentation process to inhibit the growth of unwanted microorganisms and to stabilize the wine.

Safety and Handling

Potassium bisulfite should be handled with care, as it can cause irritation to the skin, eyes, and respiratory system. It is important to use appropriate protective equipment when handling the compound and to follow safety guidelines to prevent exposure.

Related Compounds

• Sodium bisulfite
• Potassium metabisulfite
• Sulfur dioxide

Related Pages

• Preservative
• Winemaking
• Food additive