# item.guide
Side-by-Side Comparison Food Additives & E-Numbers

E101: Riboflavin (Vitamin B2 Yellow Color) vs. E631: Disodium Inosinate (IMP Meat Umami Synergist)

Comparing 2 standards across 9 specifications. 9 key differences identified.

Comparing:
E101: Riboflavin (Vitamin B2 Yellow Color)
E631: Disodium Inosinate (IMP Meat Umami Synergist)
E101: Riboflavin (Vitamin B2 Yellow Color) →

E101 (Riboflavin / Vitamin B2) is an authorized yellow food colorant and essential micronutrient produced via microbial fermentation of Ashbya gossypii. INS 101(i), ADI is 0.5 mg/kg bw/day, commonly used to fortify cereals and color sauces.

View full E101: Riboflavin (Vitamin B2 Yellow Color) spec sheet →
E631: Disodium Inosinate (IMP Meat Umami Synergist) →

E631 (Disodium 5'-Inosinate / IMP) is the sodium salt of inosinic acid, a purine nucleotide naturally found in aged beef, katsuobushi bonito flakes, and cured meats. INS 631, ADI is Not Specified, multiplying glutamate umami flavor.

View full E631: Disodium Inosinate (IMP Meat Umami Synergist) spec sheet →

Specification Comparison Table

9 Parameters
Parameter / Spec
E101: Riboflavin (Vitamin B2 Yellow Color)
E631: Disodium Inosinate (IMP Meat Umami Synergist)
E-Number Code
E101 E631
INS / Codex Number
INS 101(i) INS 631
Functional Class
Food Color (Yellow-Orange), Nutrient Fortificant Flavor Enhancer (Meat Purine Umami Synergist)
Acceptable Daily Intake (ADI)
0.5 mg / kg body weight per day Not Specified (Quantum Satis)
Chemical Formula
C17H20N4O6 C10H11N4Na2O8P · xH2O
Primary Mechanism
Yellow chromophore acting as precursor to flavin coenzymes (FAD/FMN) Allosteric conformational stabilizer of human T1R1/T1R3 G-protein umami receptor heterodimer
Common Target Foods
Fortified breakfast cereals, baby foods, pasta, dairy desserts, energy drinks Instant soups, meat seasonings, potato chips, canned meat gravies, cured snacks
Dietary Compliance
100% Vegan (Microbial fermentation), Halal, Kosher Vegan (Bacterial Corynebacterium fermentation standard), Halal, Kosher
Safety Approval
EFSA Authorized / FDA GRAS (21 CFR 73.450) EFSA Authorized / FDA GRAS (21 CFR 172.535)

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