Calcium inosinate

Names
IUPAC name

Calcium 5′-inosinate

Systematic IUPAC name

Calcium [(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-1,6-dihydro-9H-purin-9-yl)oxolan-2-yl]methyl phosphate

Other names

* Calcium inosine-5′-monophosphate
* E633

Identifiers

CAS Number

* 38966-29-9 Y

3D model (JSmol)

* Interactive image
* Interactive image

ChemSpider |

* 18598952 Y

PubChem CID

* 135565141

UNII |

* DE2I245H9C Y

InChI

* InChI=1S/C10H13N4O8P.Ca/c15-6-4(1-21-23(18,19)20)22-10(7(6)16)14-3-13-5-8(14)11-2-12-9(5)17;/h2-4,6-7,10,15-16H,1H2,(H,11,12,17)(H2,18,19,20);/q;+2/p-2/t4-,6-,7-,10-;/m1./s1 Y

Key: ZLHWLLPKQPKYJD-MCDZGGTQSA-L Y

* InChI=1/C10H13N4O8P.Ca/c15-6-4(1-21-23(18,19)20)22-10(7(6)16)14-3-13-5-8(14)11-2-12-9(5)17;/h2-4,6-7,10,15-16H,1H2,(H,11,12,17)(H2,18,19,20);/q;+2/p-2/t4-,6-,7-,10-;/m1./s1

Key: ZLHWLLPKQPKYJD-BWNJPNSSBG

SMILES

* [O-]P(OC[C@H]1O[C@@H](N2C(NC=NC3=O)=C3N=C2)[C@H](O)[C@@H]1O)([O-])=O.[Ca+2]

* [Ca+2].[O-]P([O-])(=O)OC[C@H]3O[C@@H](n2cnc1c2ncnc1O)[C@H](O)[C@@H]3O

Properties

Chemical formula

| C10H11CaN4O8P
Molar mass | 386.270 g·mol−1

Solubility in water

| sparingly

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)
Infobox references

Tracking categories (test):

* SizeSet

Calcium inosinate is a calcium salt of the nucleoside inosine. Under the E number E633, it is a food additive used as a flavor enhancer.[1][2]

## References

1. ↑ "GSFA Online Food Additive Details for Calcium 5'-inosinate". https://www.fao.org/gsfaonline/additives/details.html?d-3586470-o=2&d-3586470-s=4&d-3988876-o=1&id=330.
2. ↑ ﻿Calcium 5′-Inosinate﻿ (Food additive specification). FAO JECFA Monographs. 1. Food and Agriculture Organization of the United Nations (FAO). 2006. INS No. 633; CAS No. 76079-57-7. https://www.fao.org/fileadmin/user_upload/jecfa_additives/docs/Monograph1/Additive-087.pdf. Retrieved 13 February 2026.

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Calcium compounds

* CaAl2O4
* CaB6
* CaBr2
* Ca(BrO3)2
* CaC2
* CaCN2
* Ca(CN)2
* CaCO3
* CaC2O4
* CaCl2
* Ca(ClO)2
* Ca(ClO3)2
* CaCrO4
* CaF2
* CaH2
* Ca(HCO3)2
* CaH2S2O6
* CaI2
* Ca(IO3)2
* Ca(MnO4)2
* CaN6
* Ca(NO3)2
* CaO
* CaO2
* Ca(OH)2
* CaP
* CaS
* CaSO3
* CaSO4
* CaSe
* CaSi
* CaSi2
* CaTiO3
* Ca2P2O7
* Ca2SiO4
* Ca3Al2O6
* Ca3(AsO4)2
* Ca3(BO3)2
* Ca3(C6H5O7)2
* Ca3N2
* Ca3P2
* Ca4(PO4)2O
* Ca3(PO4)2
* Ca(H2PO4)2
* CaHPO4
* C36H70CaO4

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