Side-by-Side Comparison
Food Additives & E-Numbers
E224: Potassium Metabisulfite (Campden Salt) vs. E422: Glycerol (Glycerin Humectant & Solvent)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
E224: Potassium Metabisulfite (Campden Salt)
E422: Glycerol (Glycerin Humectant & Solvent)
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.
E422 (Glycerol / Glycerin) is a sweet, viscous trihydroxy alcohol (polyol) obtained via lipid hydrolysis. INS 422, ADI is Not Limited (Quantum Satis), acting as an essential humectant, moisture retainer, and freeze-point depressant in baked goods and icings.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E224 | E422 |
|
INS / Codex Number
|
INS 224 | INS 422 |
|
Functional Class
|
Preservative, Antioxidant, Sanitizer | Humectant, Solvent, Sweetener, Bodying Agent |
|
Acceptable Daily Intake (ADI)
|
0.7 mg / kg body weight per day (as SO2 equivalent) | Not Limited (Quantum Satis) |
|
Chemical Formula
|
K2S2O5 | C3H8O3 (Propane-1,2,3-triol) |
|
Primary Mechanism
|
Releases free SO2 and potassium ions, neutralizing wild yeasts and preventing enzymatic must oxidation | Strongly hygroscopic triol binds water molecules, lowering water activity (aw) and preventing staling |
|
Common Target Foods
|
Grape must, commercial wines, ciders, lemon juice concentrates, dried fruit processing | Fondant icings, soft-baked cookies, energy bars, cake sponges, liqueur bodying |
|
Dietary Compliance
|
Vegan, Halal, Kosher (Allergen labeling required) | Vegan (When derived from plant fats), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 182.3637) | EFSA Authorized / FDA GRAS (21 CFR 184.1320) |
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