Dimethyl dicarbonate

International Numbering System (INS) for Food Additives: 242

Food additives Europe numbers: E242 

Dimethyl dicarbonate (DMDC), also known by its INS number E 242, is a food additive used as a preservative or sterilant. Here's a breakdown of its properties and applications in food:

Function:

• DMDC acts as a broad-spectrum antimicrobial agent, effectively killing yeast, bacteria, and mold that can spoil beverages. It works by modifying the proteins and enzymes of these microorganisms, rendering them inactive.

Benefits:

• DMDC offers several advantages for beverage preservation:
  • Effective: It's highly effective against a wide range of spoilage microbes.
  • Cold Sterilization: It can achieve sterilization without the need for heat treatment, which can alter the taste and quality of some beverages.
  • Low Dosage: It's typically used in low concentrations, minimizing its impact on the final product.

Applications:

• DMDC is primarily used in non-alcoholic and alcoholic beverages:
  • Non-alcoholic beverages: carbonated or non-carbonated juice beverages, isotonic sports drinks, iced teas, and flavored waters.
  • Alcoholic beverages: Used cautiously in some wine applications where traditional methods like filtration or pasteurization aren't suitable.

Regulations and Safety:

• DMDC is generally recognized as safe (GRAS) by the FDA for use in food at approved levels.
• Regulatory bodies like the FDA and the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have established safe intake levels for DMDC.
• DMDC breaks down rapidly in water into methanol and carbon dioxide, which are generally safe at the low levels produced.

Important Considerations:

• While generally safe, DMDC can have some drawbacks:
  • Strict Regulations: Its usage is strictly regulated, and specific application methods are required to ensure safety and minimize residue levels.
  • Potential Off-Flavors: At high concentrations, DMDC can impart off-flavors to beverages.

Conclusion:

Dimethyl dicarbonate is a valuable tool for preserving beverages, but its use is controlled and requires careful handling. It offers effective sterilization at low levels while minimizing the impact on taste and quality. However, its application should comply with safety regulations to ensure consumer safety.