sorbinsyre

Sorbinsyre, or sorbic acid, is an unsaturated carboxylic acid used as a preservative in foods and cosmetics. Its IUPAC name is 2,4-hexadienoic acid. The chemical formula is C6H8O2. The molecule features a six-carbon chain bearing a carboxyl group and two conjugated double bonds (trans,trans-2,4-hexadienoic acid).

Occurrence and production: It is found in some natural foods in small amounts but is mainly manufactured synthetically for commercial use.

Uses: In the food industry, sorbic acid is used as a preservative (E200) to inhibit molds, yeasts, and fungi in acidic foods; commercial use often with potassium sorbate (E202). It is also used in cosmetics and medicines. Its antimicrobial effectiveness is greatest at low pH, and it is commonly employed in combination with other preservatives.

Stability: It is most effective at low pH; at higher pH its antimicrobial activity declines. It is relatively stable under heat but can degrade with prolonged heating or strong oxidants.

Safety: Sorbic acid has low acute toxicity and is generally recognized as safe when used within regulatory limits. Adverse reactions are rare but may include dermatitis in sensitive individuals, particularly with skin exposure or in those with sensitivities.

Regulation: Regulatory agencies in many regions approve sorbic acid as a food additive (E200) with category-specific usage limits. It is subject to purity and labeling requirements and is evaluated for safety in different product categories.