Side-by-Side Comparison
Food Additives & E-Numbers
E621: Monosodium Glutamate (MSG / Umami Flavor Enhancer) vs. E635: Disodium 5'-Ribonucleotides (I+G Blend)
Comparing 2 standards across 14 specifications. 14 key differences identified.
Comparing:
E621: Monosodium Glutamate (MSG / Umami Flavor Enhancer)
E635: Disodium 5'-Ribonucleotides (I+G Blend)
Monosodium Glutamate (E621, MSG, C5H8NO4Na) is the sodium salt of L-glutamic acid produced via Corynebacterium glutamicum sugar fermentation, activating human T1R1/T1R3 heterodimer umami taste receptors to enhance savory mouthfeel.
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
14 Parameters| Parameter / Spec | ||
|---|---|---|
|
Functional Class
|
Flavor Enhancer (Umami savory tastant) | Flavor Enhancer (Standard 50/50 IMP + GMP Umami Blend) |
|
Acceptable Daily Intake (ADI)
|
30 mg/kg body weight per day (EFSA 2017) / Not Specified (JECFA 1987) | Not Specified (Quantum Satis) |
|
INS / E-Number
|
INS 621 / E621 | — |
|
Chemical Formula
|
C₅H₈NO₄Na · H₂O (Sodium 2-aminopentanedioate monohydrate) | — |
|
Taste Receptor Target
|
T1R1 + T1R3 G-protein coupled receptor (GPCR) heterodimer + mGluR4 | — |
|
Sodium Content
|
12.3% Sodium by weight (compared to 39.3% in standard table salt NaCl) | — |
|
Synergistic Umami Multiplication
|
1:1 ratio with E627 (Disodium Guanylate) / E631 (Disodium Inosinate) increases umami perception up to 8-fold | — |
|
E-Number Code
|
— | E635 |
|
INS / Codex Number
|
— | INS 635 |
|
Composition
|
— | 50% Disodium Inosinate (E631) + 50% Disodium Guanylate (E627) |
|
Primary Mechanism
|
— | Maximum simultaneous allosteric sensitization of oral T1R1+T1R3 umami receptor sites |
|
Common Target Foods
|
— | Flavored potato chips, instant noodles, dry soup mixes, processed meats, barbecue sauces |
|
Dietary Compliance
|
— | Vegan (Bacterial sugar fermentation), Halal, Kosher |
|
Safety Approval
|
— | EFSA Authorized / FDA GRAS |
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