Side-by-Side Comparison
Food Additives & E-Numbers
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing) vs. E260: Acetic Acid (Vinegar Acidulant / Preservative)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing)
E260: Acetic Acid (Vinegar Acidulant / Preservative)
E251 (Sodium Nitrate / NaNO3) is an inorganic salt serving as a slow-release chemical reservoir of nitrite in long-aged cured meats and hard cheeses. INS 251, ADI is 3.7 mg/kg bw/day, enzymatically reduced into nitrite over months of curing.
E260 (Acetic Acid / Ethanoic acid) is a natural carboxylic acid produced via aerobic Acetobacter fermentation of ethanol. INS 260, ADI is Not Limited (Quantum Satis), giving vinegar its characteristic pungent sour flavor and pickling preservative action.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E251 | E260 |
|
INS / Codex Number
|
INS 251 | INS 260 |
|
Functional Class
|
Preservative, Curing Agent, Antimicrobial | Acidity Regulator, Preservative, Flavoring Tastant |
|
Acceptable Daily Intake (ADI)
|
3.7 mg / kg body weight per day (as nitrate ion) | Not Limited (Quantum Satis) |
|
Chemical Formula
|
NaNO3 | CH3COOH (pKa 4.76) |
|
Primary Mechanism
|
Micrococcus and Staphylococcus bacterial nitrate reductase slowly converts nitrate (NO3-) into bioactive nitrite (NO2-) | Lowers pH below 4.2, destroying bacterial cell membrane proton motive force |
|
Common Target Foods
|
Prosciutto di Parma, dry-cured salamis, Gouda cheeses (prevents late blowing by Clostridium tyrobutyricum) | Table vinegars (4–8%), pickled cucumbers, mustard, mayonnaise, tomato ketchup |
|
Dietary Compliance
|
Mineral synthesis, Halal, Kosher, Vegan compliance | 100% Vegan (Biological vinegar fermentation), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA 9 CFR 424.21 | EFSA Authorized / FDA GRAS (21 CFR 184.1005) |
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