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

E338: Phosphoric Acid (Cola Acidulant) vs. E412: Guar Gum (Cold-Soluble Galactomannan)

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

Comparing:
E338: Phosphoric Acid (Cola Acidulant)
E412: Guar Gum (Cold-Soluble Galactomannan)
E338: Phosphoric Acid (Cola Acidulant) →

E338 (Phosphoric Acid / H3PO4) is a mineral inorganic acid providing a uniquely dry, tangy, astringent sourness. INS 338, group ADI is 40 mg/kg bw/day (as phosphorus), the quintessential acidulant in cola beverages and processed cheeses.

View full E338: Phosphoric Acid (Cola Acidulant) spec sheet →
E412: Guar Gum (Cold-Soluble Galactomannan) →

E412 (Guar Gum) is a natural galactomannan hydrocolloid extracted from guar beans (Cyamopsis tetragonoloba). INS 412, ADI is Not Limited (Quantum Satis), boasting 8x the thickening power of cornstarch and hydrating completely in cold water.

View full E412: Guar Gum (Cold-Soluble Galactomannan) spec sheet →

Specification Comparison Table

10 Parameters
Parameter / Spec
E338: Phosphoric Acid (Cola Acidulant)
E412: Guar Gum (Cold-Soluble Galactomannan)
E-Number Code
E338 E412
INS / Codex Number
INS 338 INS 412
Functional Class
Acidulant, Acidity Regulator, Sequestrant, Emulsifying Salt Thickener, Emulsion Stabilizer, Dietary Fiber
Acceptable Daily Intake (ADI)
40 mg / kg body weight per day (Group ADI as phosphorus) Not Limited (Quantum Satis)
Primary Mechanism
Lowers beverage pH to ~2.5 with a clean, sharp, non-fruity tang; retards bacterial outgrowth Entangles water molecules via extensive hydrogen bonding, producing high viscosity at low shear
Common Target Foods
Cola soft drinks, root beers, processed cheese melts, sports hydration drinks Gluten-free baked goods, salad dressings, ice creams, sauces, instant soup powders
Dietary Compliance
Vegan (Mineral phosphate synthesis), Halal, Kosher 100% Vegan (Guar bean seed endosperm), Halal, Kosher, Non-GMO
Safety Approval
EFSA Authorized / FDA GRAS (21 CFR 182.1073) EFSA Authorized / FDA GRAS (21 CFR 184.1339)
Chemical Formula
H3PO4 (pKa1 2.15) —
Mannose to Galactose Ratio
— 2 : 1 (High galactose substitution enables instant cold water solubility)

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Propionate (Bread Anti-Mold) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E290: Carbon Dioxide (Carbonation & MAP Gas) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E300: L-Ascorbic Acid (Vitamin C Antioxidant & Flour Improver) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E306: Tocopherol-Rich Extract (Natural Vitamin E Antioxidant) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E322: Lecithin (Phospholipid Emulsifier & Viscosity Reducer) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E330: Citric Acid (Universal Acidulant / Chelator) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E334: L-Tartaric Acid (Wine & Baking Acidulant) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E406: Agar-Agar (Seaweed Hydrocolloid Gel) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E407: Carrageenan (Dairy Stabilizer Hydrocolloid) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E410: Locust Bean Gum (Carob Bean Gum / LBG) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E414: Gum Arabic (Acacia Gum Emulsifier) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E415: Xanthan Gum (Pseudoplastic Hydrocolloid Thickener) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E422: Glycerol (Glycerin Humectant & Solvent) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E440: Pectin (Citrus & Apple Jam Gelling Fiber) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E460: Microcrystalline Cellulose (MCC / Dietary Bulking) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E471: Mono- & Diglycerides of Fatty Acids (Bread Softener) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E500: Sodium Bicarbonate (Baking Soda / Ins 500ii) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E501: Potassium Carbonate (Potash / Alkaline Noodle Salt) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E509: Calcium Chloride (Firming Agent / Cheese Salt) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E621: Monosodium Glutamate (MSG / Umami Flavor Enhancer) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E627: Disodium Guanylate (GMP Umami Synergist) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E631: Disodium Inosinate (IMP Meat Umami Synergist) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E635: Disodium 5'-Ribonucleotides (I+G Blend) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E950: Acesulfame Potassium (Ace-K / 200x Sweetener) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E951: Aspartame (Dipeptide Sweetener / 200x) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E955: Sucralose (Splenda / 600x Heat-Stable Sweetener) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E960: Steviol Glycosides (Reb-A / Stevia Extract) → Compare E338: Phosphoric Acid (Cola Acidulant) vs. E965: Maltitol (Sugar Alcohol / 90% Sweetness) → Compare E338: Phosphoric Acid (Cola 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