Sodium Sulfite (INS 221) in Food Use
1. Overview
Sodium sulfite (INS 221) is a food additive used primarily as a preservative, antioxidant, and bleaching agent. It belongs to the sulfite group and helps prevent oxidation, discoloration, and microbial spoilage in various food products.
2. Functions in Food
- Preservative: Inhibits bacterial and fungal growth, extending shelf life.
- Antioxidant: Prevents oxidation of food, preserving color and freshness.
- Bleaching Agent: Helps maintain a bright color in processed foods.
- Dough Conditioner: Improves texture in bakery products.
3. Common Food Applications
- Dried Fruits & Vegetables: Prevents browning and maintains color.
- Wine & Beer Production: Used to control microbial growth and prevent oxidation.
- Processed Meat & Seafood: Helps retain color and delays spoilage.
- Bakery Products: Acts as a dough conditioner.
- Canned & Pickled Foods: Preserves color and prevents spoilage.
- Juices & Soft Drinks: Stabilizes color and prevents oxidation.
4. Safety & Regulations
- Regulatory Approval: Approved by many food safety authorities (e.g., FDA, EFSA, Codex Alimentarius) but with strict limits.
- Allergy & Sensitivity: Some individuals, especially those with asthma, may have allergic reactions or sulfite sensitivity.
- Maximum Usage Limits: Varies by country and food category.
