Side-by-Side Comparison
Food Additives & E-Numbers
E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn) vs. E621: Monosodium Glutamate (MSG / Umami Flavor Enhancer)
Comparing 2 standards across 13 specifications. 13 key differences identified.
Comparing:
E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn)
E621: Monosodium Glutamate (MSG / Umami Flavor Enhancer)
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.
Monosodium Glutamate (E621, MSG, C5H8NO4Na) is the sodium salt of L-glutamic acid produced via Corynebacterium glutamicum sugar fermentation, activating human T1R1/T1R3 heterodimer umami taste receptors to enhance savory mouthfeel.
Specification Comparison Table
13 Parameters| Parameter / Spec | ||
|---|---|---|
|
Functional Class
|
Raising Agent, Acidity Regulator | Flavor Enhancer (Umami savory tastant) |
|
Acceptable Daily Intake (ADI)
|
Not Limited (Quantum Satis) | 30 mg/kg body weight per day (EFSA 2017) / Not Specified (JECFA 1987) |
|
Chemical Formula
|
(NH4)HCO3 | C₅H₈NO₄Na · H₂O (Sodium 2-aminopentanedioate monohydrate) |
|
E-Number Code
|
E503 | — |
|
INS / Codex Number
|
INS 503(ii) | — |
|
Primary Mechanism
|
Thermal decomposition leaves zero residual water or alkali salts: (NH4)HCO3 -> NH3(g) + CO2(g) + H2O(g) | — |
|
Common Target Foods
|
Thin crispy crackers, Italian biscotti, Greek koulourakia, sugar wafer shells | — |
|
Dietary Compliance
|
Vegan (Mineral synthesis), Halal, Kosher | — |
|
Safety Approval
|
EFSA Authorized / FDA GRAS (21 CFR 184.1137) | — |
|
INS / E-Number
|
— | INS 621 / E621 |
|
Taste Receptor Target
|
— | T1R1 + T1R3 G-protein coupled receptor (GPCR) heterodimer + mGluR4 |
|
Sodium Content
|
— | 12.3% Sodium by weight (compared to 39.3% in standard table salt NaCl) |
|
Synergistic Umami Multiplication
|
— | 1:1 ratio with E627 (Disodium Guanylate) / E631 (Disodium Inosinate) increases umami perception up to 8-fold |
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