E270: Lactic Acid (Biological Acidulant) vs. E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn)
Comparing 2 standards across 9 specifications. 8 key differences identified.
E270 (L-Lactic Acid) is a natural alpha-hydroxy acid produced by fermentation of carbohydrates by lactic acid bacteria (Lactobacillus). INS 270, ADI is Not Limited (Quantum Satis), imparting a smooth, mild sour taste in dairy, beers, and bakery sourdoughs.
E503 (Ammonium Bicarbonate / (NH4)HCO3) is a historic chemical leavening salt. INS 503(ii), ADI is Not Limited (Quantum Satis), decomposing 100% into gaseous CO2, ammonia, and water at temperatures >60°C to create ultra-crisp, airy crackers and cookies.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E270 | E503 |
|
INS / Codex Number
|
INS 270 | INS 503(ii) |
|
Functional Class
|
Acidity Regulator, Preservative, Flavoring Agent | Raising Agent, Acidity Regulator |
|
Acceptable Daily Intake (ADI)
|
Not Limited (Quantum Satis) | Not Limited (Quantum Satis) |
|
Chemical Formula
|
C3H6O3 (2-hydroxypropanoic acid, pKa 3.86) | (NH4)HCO3 |
|
Primary Mechanism
|
Provides sustained buffering and mild tartness while suppressing spore-forming spoilage bacteria | Thermal decomposition leaves zero residual water or alkali salts: (NH4)HCO3 -> NH3(g) + CO2(g) + H2O(g) |
|
Common Target Foods
|
Yogurt, sourdough breads, sour ales (Berliner Weisse), olives, confectionery, carcass rinses | Thin crispy crackers, Italian biscotti, Greek koulourakia, sugar wafer shells |
|
Dietary Compliance
|
100% Vegan (Bacterial fermentation of beet/corn sugar), Halal, Kosher | Vegan (Mineral synthesis), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 184.1061) | EFSA Authorized / FDA GRAS (21 CFR 184.1137) |