E220: Sulfur Dioxide (Antioxidant & Wine Preservative) vs. E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn)
Comparing 2 standards across 9 specifications. 9 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.
E503 (Ammonium Bicarbonate / (NH4)HCO3) is a historic chemical leavening salt. INS 503(ii), ADI is Not Limited (Quantum Satis), decomposing 100% into gaseous CO2, ammonia, and water at temperatures >60°C to create ultra-crisp, airy crackers and cookies.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E220 | E503 |
|
INS / Codex Number
|
INS 220 | INS 503(ii) |
|
Functional Class
|
Preservative, Antioxidant, Enzymatic Browning Inhibitor | Raising Agent, Acidity Regulator |
|
Acceptable Daily Intake (ADI)
|
0.7 mg / kg body weight per day (as SO2 equivalent) | Not Limited (Quantum Satis) |
|
Chemical Formula
|
SO2 | (NH4)HCO3 |
|
Primary Mechanism
|
Molecular SO2 penetrates microbial membranes; bisulfite (HSO3-) cleaves disulfide bonds in enzymes and binds acetaldehyde | Thermal decomposition leaves zero residual water or alkali salts: (NH4)HCO3 -> NH3(g) + CO2(g) + H2O(g) |
|
Common Target Foods
|
Wines (Contains sulfites declaration >10mg/L), dried apricots, ciders, potato starch | Thin crispy crackers, Italian biscotti, Greek koulourakia, sugar wafer shells |
|
Dietary Compliance
|
Vegan, Halal, Kosher, Major Allergen Declaration Mandatory | Vegan (Mineral synthesis), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 182.3862 - Banned on raw produce) | EFSA Authorized / FDA GRAS (21 CFR 184.1137) |