Side-by-Side Comparison
Food Additives & E-Numbers
E250: Sodium Nitrite (Curing Salt / Anti-Botulism Preservative) vs. E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn)
Comparing 2 standards across 12 specifications. 12 key differences identified.
Comparing:
E250: Sodium Nitrite (Curing Salt / Anti-Botulism Preservative)
E503: Ammonium Bicarbonate (Baker's Ammonia / Hartshorn)
Sodium nitrite (E250, NaNO2) is an inorganic salt used in cured charcuterie, bacon, and processed meats to inhibit Clostridium botulinum neurotoxin germination, fix cured pink nitrosyl-myoglobin color, and retard lipid autoxidation.
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
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
Chemical Formula
|
NaNO₂ (Molecular Weight: 68.995 g/mol) | (NH4)HCO3 |
|
Functional Class
|
Preservative / Color Retention Agent (Curing Salt) | Raising Agent, Acidity Regulator |
|
Acceptable Daily Intake (ADI)
|
0–0.07 mg/kg body weight per day (EFSA / JECFA) | Not Limited (Quantum Satis) |
|
INS / E-Number
|
INS 250 / E250 | — |
|
USDA Maximum Residual Level
|
156 ppm in cured meat / 200 ppm in dry cured ham / 120 ppm in bacon with ascorbate | — |
|
Botulism Inhibition Threshold
|
Inhibits Clostridium botulinum spore outgrowth at ≥50–100 mg/kg in presence of NaCl | — |
|
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) |
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