Side-by-Side Comparison
Food Additives & E-Numbers
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing) vs. E471: Mono- & Diglycerides of Fatty Acids (Bread Softener)
Comparing 2 standards across 10 specifications. 10 key differences identified.
Comparing:
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing)
E471: Mono- & Diglycerides of Fatty Acids (Bread Softener)
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.
E471 is an authorized food emulsifier composed of glycerol esterified with one or two fatty acid chains (glycerol monostearate / monooleate). INS 471, ADI is Not Limited (Quantum Satis), globally recognized as the ultimate crumb softener and amylose complexing agent in bakery.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E251 | E471 |
|
INS / Codex Number
|
INS 251 | INS 471 |
|
Functional Class
|
Preservative, Curing Agent, Antimicrobial | Emulsifier, Anti-Staling Agent, Crumb Softener, Defoamer |
|
Acceptable Daily Intake (ADI)
|
3.7 mg / kg body weight per day (as nitrate ion) | Not Limited (Quantum Satis) |
|
Primary Mechanism
|
Micrococcus and Staphylococcus bacterial nitrate reductase slowly converts nitrate (NO3-) into bioactive nitrite (NO2-) | Fatty acid chain complexes into helical starch amylose cavity, preventing retrogradation staling |
|
Common Target Foods
|
Prosciutto di Parma, dry-cured salamis, Gouda cheeses (prevents late blowing by Clostridium tyrobutyricum) | Sliced sandwich bread, margarines, ice creams, peanut butter (Prevents oil separation), cake mixes |
|
Dietary Compliance
|
Mineral synthesis, Halal, Kosher, Vegan compliance | Vegan (When derived from palm/sunflower oil; animal fat variants must be labeled) |
|
Safety Approval
|
EFSA Authorized / FDA 9 CFR 424.21 | EFSA Authorized / FDA GRAS (21 CFR 184.1505) |
|
Chemical Formula
|
NaNO3 | — |
|
Hydrophilic-Lipophilic Balance (HLB)
|
— | 3.5 – 4.5 (Lipophilic water-in-oil emulsifier) |
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