Side-by-Side Comparison
Food Additives & E-Numbers
E224: Potassium Metabisulfite (Campden Salt) vs. E501: Potassium Carbonate (Potash / Alkaline Noodle Salt)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
E224: Potassium Metabisulfite (Campden Salt)
E501: Potassium Carbonate (Potash / Alkaline Noodle Salt)
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.
E501 (Potassium Carbonates / K2CO3) is an inorganic alkaline mineral salt. INS 501(i), ADI is Not Limited (Quantum Satis), used as the key 'Kansui' alkaline agent in Japanese ramen noodles and in the Dutch processing of cocoa powder.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E224 | E501 |
|
INS / Codex Number
|
INS 224 | INS 501(i) (Potassium Carbonate) |
|
Functional Class
|
Preservative, Antioxidant, Sanitizer | Acidity Regulator, Alkaline Leavening, Kansui Salt |
|
Acceptable Daily Intake (ADI)
|
0.7 mg / kg body weight per day (as SO2 equivalent) | Not Limited (Quantum Satis) |
|
Chemical Formula
|
K2S2O5 | K2CO3 |
|
Primary Mechanism
|
Releases free SO2 and potassium ions, neutralizing wild yeasts and preventing enzymatic must oxidation | Alkalinizes noodle dough (pH 9–11), tightening glutenin network and converting flavonoid pigments yellow |
|
Common Target Foods
|
Grape must, commercial wines, ciders, lemon juice concentrates, dried fruit processing | Ramen noodles (Kansui), Dutch-process alkalized cocoa powder, gingerbread leavening |
|
Dietary Compliance
|
Vegan, Halal, Kosher (Allergen labeling required) | Vegan (Mineral salt), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 182.3637) | EFSA Authorized / FDA GRAS (21 CFR 184.1619) |
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