Side-by-Side Comparison
Food Additives & E-Numbers
E224: Potassium Metabisulfite (Campden Salt) vs. E500: Sodium Bicarbonate (Baking Soda / Ins 500ii)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
E224: Potassium Metabisulfite (Campden Salt)
E500: Sodium Bicarbonate (Baking Soda / Ins 500ii)
E224 (Potassium Metabisulfite / K2S2O5) is a white crystalline powder releasing 57.6% sulfur dioxide by weight when dissolved in acidic liquids. INS 224, ADI is 0.7 mg/kg bw/day, the premier sanitizing and stabilizing agent in commercial winemaking.
E500 (Sodium Carbonates / Sodium Bicarbonate NaHCO3) is a mineral salt leavening agent and pH buffer. INS 500(ii), ADI is Not Limited (Quantum Satis), decomposing under heat and acid to produce carbon dioxide bubbles that expand cakes, cookies, and pretzel crusts.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E224 | E500 |
|
INS / Codex Number
|
INS 224 | INS 500(ii) (Bicarbonate) / 500(i) (Carbonate) |
|
Functional Class
|
Preservative, Antioxidant, Sanitizer | Raising / Leavening Agent, Acidity Regulator, Anti-Caking |
|
Acceptable Daily Intake (ADI)
|
0.7 mg / kg body weight per day (as SO2 equivalent) | Not Limited (Quantum Satis) |
|
Chemical Formula
|
K2S2O5 | NaHCO3 (Sodium Hydrogen Carbonate) |
|
Primary Mechanism
|
Releases free SO2 and potassium ions, neutralizing wild yeasts and preventing enzymatic must oxidation | Thermal (>50°C) or acid neutralization releases CO2 gas: NaHCO3 + H+ -> Na+ + H2O + CO2 |
|
Common Target Foods
|
Grape must, commercial wines, ciders, lemon juice concentrates, dried fruit processing | Baking powders, cookies, cakes, pretzel alkaline dips, effervescent drink tablets |
|
Dietary Compliance
|
Vegan, Halal, Kosher (Allergen labeling required) | 100% Vegan (Mineral Solvay process/Trona mining), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 182.3637) | EFSA Authorized / FDA GRAS (21 CFR 184.1736) |
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