E220: Sulfur Dioxide (Antioxidant & Wine Preservative) vs. E306: Tocopherol-Rich Extract (Natural Vitamin E Antioxidant)
Comparing 2 standards across 10 specifications. 10 key differences identified.
E220 (Sulfur Dioxide / SO2) is an inorganic gas dissolved in water to generate bisulfite and sulfite ions, providing potent antimicrobial and polyphenol oxidase enzyme-inhibiting properties. INS 220, group ADI is 0.7 mg/kg bw/day.
E306 is a natural mixture of alpha-, beta-, gamma-, and delta-tocopherols steam-distilled from vegetable oils (soybean, sunflower). INS 306, ADI is Not Limited, serving as the gold standard lipid-soluble antioxidant in fats and oils.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E220 | E306 |
|
INS / Codex Number
|
INS 220 | INS 306 |
|
Functional Class
|
Preservative, Antioxidant, Enzymatic Browning Inhibitor | Antioxidant (Lipid Peroxidation Inhibitor) |
|
Acceptable Daily Intake (ADI)
|
0.7 mg / kg body weight per day (as SO2 equivalent) | Not Limited (Quantum Satis) |
|
Primary Mechanism
|
Molecular SO2 penetrates microbial membranes; bisulfite (HSO3-) cleaves disulfide bonds in enzymes and binds acetaldehyde | Free-radical scavenger donating phenolic hydrogen atoms to peroxyl radicals (ROO•), breaking lipid auto-oxidation chain |
|
Common Target Foods
|
Wines (Contains sulfites declaration >10mg/L), dried apricots, ciders, potato starch | Vegetable cooking oils, margarines, infant formula, fish oil capsules, potato crisps |
|
Dietary Compliance
|
Vegan, Halal, Kosher, Major Allergen Declaration Mandatory | 100% Vegan (Plant oil distillate), Halal, Kosher Certified |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 182.3862 - Banned on raw produce) | EFSA Authorized / FDA GRAS (21 CFR 184.1890) |
|
Chemical Formula
|
SO2 | — |
|
Active Isomers
|
— | d-Gamma-Tocopherol, d-Delta-Tocopherol, d-Alpha-Tocopherol |