Side-by-Side Comparison
Food Additives & E-Numbers
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing) vs. E951: Aspartame (Dipeptide Sweetener / 200x)
Comparing 2 standards across 11 specifications. 11 key differences identified.
Comparing:
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing)
E951: Aspartame (Dipeptide Sweetener / 200x)
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.
E951 (Aspartame) is a methyl ester of the aspartic acid/phenylalanine dipeptide yielding ~200x the sweetness of sucrose. INS 951, ADI is 40 mg/kg bw/day, the historic sweetener in Diet Coke and tabletop sweetener packets.
Specification Comparison Table
11 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E251 | E951 |
|
INS / Codex Number
|
INS 251 | INS 951 |
|
Functional Class
|
Preservative, Curing Agent, Antimicrobial | High-Intensity Artificial Sweetener |
|
Acceptable Daily Intake (ADI)
|
3.7 mg / kg body weight per day (as nitrate ion) | 40 mg / kg body weight per day (US FDA: 50 mg/kg) |
|
Primary Mechanism
|
Micrococcus and Staphylococcus bacterial nitrate reductase slowly converts nitrate (NO3-) into bioactive nitrite (NO2-) | Stimulates T1R2/T1R3 sweet taste receptors with clean, sugar-like taste profile |
|
Common Target Foods
|
Prosciutto di Parma, dry-cured salamis, Gouda cheeses (prevents late blowing by Clostridium tyrobutyricum) | Diet sodas, tabletop sweetener packets (Equal), sugar-free gelatin desserts, drink mixes |
|
Dietary Compliance
|
Mineral synthesis, Halal, Kosher, Vegan compliance | Vegetarian, Halal, Kosher, Contains Phenylalanine (Warning for PKU patients mandatory) |
|
Safety Approval
|
EFSA Authorized / FDA 9 CFR 424.21 | EFSA Authorized / FDA Approved (21 CFR 172.804) |
|
Chemical Formula
|
NaNO3 | — |
|
Relative Sweetness Index
|
— | 200x Sucrose |
|
Caloric Value
|
— | 4.0 kcal / g (Negligible at use levels / ~0.1 kcal per serving) kcal/g |
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