Inosinic acid, 5'-

INS 630

Used as a flavour enhancer.

Inosinic acid is a savoury flavour enhancer that barely tastes of anything alone. Its power is in combination: with glutamate it multiplies savoury intensity many times over, which is why Japanese dashi pairs kombu seaweed with dried bonito rather than using either by itself.

Where it is and isn’t permitted

Status of Inosinic acid, 5'- by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationNot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.
Codex AlimentariusCodex Alimentarius Commission / JECFAPermitted, with conditions

1 food category

no numerical limit (good manufacturing practice)

CXS 192-1995 Table Three, INS 630and 1 further provisionretrieved 2026-09-07

What it is made from

Produced by bacterial fermentation, or by hydrolysing yeast RNA. It occurs naturally in meat and fish — bonito flakes are the classic source — and the commercial route is not usually declared.

  • Vegan status depends on the source
  • Vegetarian status depends on the source
  • May raise a halal question
  • May raise a kosher question

This is not an omission. What this additive is made from is not fixed — depending on the manufacturer it may be plant, animal or microbial in origin, nobody is required to say which, and the same product can change source between production runs. Ask the manufacturer if it matters to you; a label cannot answer it.

InChIKey
GRSZFWQUAKGDAV-KQYNXXCUSA-N
PubChem
CID 135398640

Every name it appears under

46 recorded names. A label may use any of them.

INS number

  • 630

CAS registry number

  • 131-99-7

Other names

  • 2'-inosine-5'-monophosphate
  • 5'-aInosinic acid
  • 5'-IMP
  • 5'-IMP; IMP; Inosine 5'-(dihydrogen phosphate)
  • 5'-inosinate
  • 5'-inosine monophosphate
  • 5'-inosinic acid
  • 5?Inosinic Acid
  • [3h]inosine monophosphate
  • Acid, Inosinic
  • BRN 0630517
  • Cytosine inosinate
  • HYPOXANTHINE RIBOSIDE-5-PHOSPHORIC ACID
  • hypoxanthosine 5'-monophosphate
  • I-5 inverted exclamation marka-P IMP Inosinic Acid;IMP
  • IMP
  • Inosine 5' monophosphate
  • Inosine 5'-(dihydrogen phosphate)
  • inosine 5'-monophosphate
  • Inosine 5'-monophosphate - from Saccharomyces Cerevisiae
  • Inosine 5'-Monophosphoric acid
  • inosine 5'-phosphate
  • inosine monophosphate
  • inosine phosphate
  • Inosine-5'-(dihydrogen phosphate)
  • INOSINE-5'-MONOPHOSPHATE
  • Inosine-5'-monophosphoric acid
  • Inosinic acid
  • Inosinic acid (Standard)
  • INOSINIC ACID, 5'-
  • inosinsaure
  • INS NO.630
  • INS-630
  • ribosylhypoxanthine monophosphate
  • TAO7US05G5

Systematic names

  • ((2R,3S,4R,5R)-3,4-Dihydroxy-5-(6-hydroxy-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl dihydrogen phosphate
  • ((2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-1H-purin-9(6H)-yl)tetrahydrofuran-2-yl)methyl dihydrogen phosphate
  • [(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-hydroxypurin-9-yl)oxolan-2-yl]methyl dihydrogen phosphate
  • [(2R,3S,4R,5R)-3,4-Dihydroxy-5-(6-oxo-1H-purin-9-yl)oxolan-2-yl]methyl dihydrogen phosphate
  • [(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-1H-purin-9-yl)tetrahydrofuran-2-yl]methyl dihydrogen phosphate
  • [(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-3H-purin-9-yl)oxolan-2-yl]methyl dihydrogen
  • [(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-3H-purin-9-yl)tetrahydrofuran-2-yl]methyl dihydrogen phosphate
  • {[(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-6,9-dihydro-1H-purin-9-yl)oxolan-2-yl]methoxy}phosphonic acid
  • {[(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-6,9-dihydro-3H-purin-9-yl)oxolan-2-yl]methoxy}phosphonic acid

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • gsfa retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/inosinic-acid-5.json