Side-by-Side Comparison
Food Additives & E-Numbers
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing) vs. E635: Disodium 5'-Ribonucleotides (I+G Blend)
Comparing 2 standards across 10 specifications. 10 key differences identified.
Comparing:
E251: Sodium Nitrate (Chile Saltpeter / Slow Curing)
E635: Disodium 5'-Ribonucleotides (I+G Blend)
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.
E635 (I+G) is a standardized 50/50 co-crystallized blend of disodium inosinate (E631) and disodium guanylate (E627). INS 635, ADI is Not Specified, serving as the commercial standard umami booster in global food manufacturing.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
E-Number Code
|
E251 | E635 |
|
INS / Codex Number
|
INS 251 | INS 635 |
|
Functional Class
|
Preservative, Curing Agent, Antimicrobial | Flavor Enhancer (Standard 50/50 IMP + GMP Umami Blend) |
|
Acceptable Daily Intake (ADI)
|
3.7 mg / kg body weight per day (as nitrate ion) | Not Specified (Quantum Satis) |
|
Primary Mechanism
|
Micrococcus and Staphylococcus bacterial nitrate reductase slowly converts nitrate (NO3-) into bioactive nitrite (NO2-) | Maximum simultaneous allosteric sensitization of oral T1R1+T1R3 umami receptor sites |
|
Common Target Foods
|
Prosciutto di Parma, dry-cured salamis, Gouda cheeses (prevents late blowing by Clostridium tyrobutyricum) | Flavored potato chips, instant noodles, dry soup mixes, processed meats, barbecue sauces |
|
Dietary Compliance
|
Mineral synthesis, Halal, Kosher, Vegan compliance | Vegan (Bacterial sugar fermentation), Halal, Kosher |
|
Safety Approval
|
EFSA Authorized / FDA 9 CFR 424.21 | EFSA Authorized / FDA GRAS |
|
Chemical Formula
|
NaNO3 | — |
|
Composition
|
— | 50% Disodium Inosinate (E631) + 50% Disodium Guanylate (E627) |
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