E170: Calcium Carbonate (Mineral White Color / Anti-Caking) vs. E224: Potassium Metabisulfite (Campden Salt)
Comparing 2 standards across 9 specifications. 9 key differences identified.
E170 (Calcium Carbonate / CaCO3) is a fine mineral salt mined from limestone or precipitated synthetically. INS 170(i), ADI is Not Limited (Quantum Satis), serving as a white surface colorant, acidity buffer, anti-caking agent, and calcium nutrient fortificant.
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.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E170 | E224 |
|
INS / Codex Number
|
INS 170(i) | INS 224 |
|
Functional Class
|
Food Color (White / Opacifier), Anti-Caking, Acidity Regulator, Nutrient | Preservative, Antioxidant, Sanitizer |
|
Acceptable Daily Intake (ADI)
|
Not Limited (Quantum Satis) | 0.7 mg / kg body weight per day (as SO2 equivalent) |
|
Chemical Formula
|
CaCO3 | K2S2O5 |
|
Primary Mechanism
|
High refractive index light scattering creating white opacity; neutralizes acids to calcium salts and CO2 | Releases free SO2 and potassium ions, neutralizing wild yeasts and preventing enzymatic must oxidation |
|
Common Target Foods
|
Chewing gum coatings, plant milks (Soy/Almond calcium fortification), baking powders, tablets | Grape must, commercial wines, ciders, lemon juice concentrates, dried fruit processing |
|
Dietary Compliance
|
Vegan (Mineral limestone), Halal, Kosher | Vegan, Halal, Kosher (Allergen labeling required) |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 184.1191) | EFSA Authorized / FDA GRAS (21 CFR 182.3637) |