# item.guide
Side-by-Side Comparison Food Additives & E-Numbers

E224: Potassium Metabisulfite (Campden Salt) vs. E407: Carrageenan (Dairy Stabilizer Hydrocolloid)

Comparing 2 standards across 10 specifications. 10 key differences identified.

Comparing:
E224: Potassium Metabisulfite (Campden Salt)
E407: Carrageenan (Dairy Stabilizer Hydrocolloid)
E224: Potassium Metabisulfite (Campden 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.

View full E224: Potassium Metabisulfite (Campden Salt) spec sheet →
E407: Carrageenan (Dairy Stabilizer Hydrocolloid) →

E407 (Carrageenan) is a high-molecular-weight sulfated polygalactan extracted from red edible seaweeds (Chondrus crispus / Irish Moss). INS 407, ADI is 75 mg/kg bw/day, famed for stabilizing cocoa suspension in chocolate milk via kappa-casein binding.

View full E407: Carrageenan (Dairy Stabilizer Hydrocolloid) spec sheet →

Specification Comparison Table

10 Parameters
Parameter / Spec
E224: Potassium Metabisulfite (Campden Salt)
E407: Carrageenan (Dairy Stabilizer Hydrocolloid)
E-Number Code
E224 E407
INS / Codex Number
INS 224 INS 407
Functional Class
Preservative, Antioxidant, Sanitizer Thickener, Gelling Agent, Emulsion Stabilizer
Acceptable Daily Intake (ADI)
0.7 mg / kg body weight per day (as SO2 equivalent) 75 mg / kg body weight per day
Primary Mechanism
Releases free SO2 and potassium ions, neutralizing wild yeasts and preventing enzymatic must oxidation Negative sulfate esters cross-link with positive charges on milk kappa-casein micelles
Common Target Foods
Grape must, commercial wines, ciders, lemon juice concentrates, dried fruit processing Chocolate milks, whipping creams, plant-based milks, deli turkey meats (water binding)
Dietary Compliance
Vegan, Halal, Kosher (Allergen labeling required) 100% Vegan (Marine seaweed), Halal, Kosher
Safety Approval
EFSA Authorized / FDA GRAS (21 CFR 182.3637) EFSA Authorized / FDA GRAS (21 CFR 172.620)
Chemical Formula
K2S2O5 —
Major Types
— Kappa (Rigid brittle gel), Iota (Elastic thixotropic gel), Lambda (Non-gelling thickener)

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Calcium Propionate (Bread Anti-Mold) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E290: Carbon Dioxide (Carbonation & MAP Gas) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E300: L-Ascorbic Acid (Vitamin C Antioxidant & Flour Improver) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E306: Tocopherol-Rich Extract (Natural Vitamin E Antioxidant) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E322: Lecithin (Phospholipid Emulsifier & Viscosity Reducer) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E330: Citric Acid (Universal Acidulant / Chelator) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E334: L-Tartaric Acid (Wine & Baking Acidulant) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E338: Phosphoric Acid (Cola Acidulant) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E406: Agar-Agar (Seaweed Hydrocolloid Gel) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E410: Locust Bean 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Alkaline Noodle Salt) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E509: Calcium Chloride (Firming Agent / Cheese Salt) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E621: Monosodium Glutamate (MSG / Umami Flavor Enhancer) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E627: Disodium Guanylate (GMP Umami Synergist) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E631: Disodium Inosinate (IMP Meat Umami Synergist) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E635: Disodium 5'-Ribonucleotides (I+G Blend) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E950: Acesulfame Potassium (Ace-K / 200x Sweetener) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E951: Aspartame (Dipeptide Sweetener / 200x) → Compare E224: Potassium Metabisulfite (Campden Salt) vs. E955: Sucralose (Splenda / 600x 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