Home/Chemicals/65-46-3

Chemical substance record

Cytidine

65-46-3C₉H₁₃N₃O₅243.219 g/mol

Organic/Inorganic Small MoleculeChEBI source record

A pyrimidine nucleoside in which cytosine is attached to ribofuranose via a β-N1-glycosidic bond. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	65-46-3	ChEBI ↗
Molecular formula	C₉H₁₃N₃O₅	ChEBI ↗
Molar mass	243.219 g/mol	ChEBI ↗
Monoisotopic mass	243.08552 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:17562	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	243.22 g/mol	PubChem ↗
Exact mass	243.08552052 Da	PubChem ↗
Computed XLogP	-2.1	PubChem ↗
Topological polar surface area (Å²)	129	PubChem ↗
H-bond donors	4	PubChem ↗
H-bond acceptors	5	PubChem ↗
Rotatable bonds	2	PubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

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Source preferred name

cytidine

IUPAC name

cytidine

InChIKey

UHDGCWIWMRVCDJ-XVFCMESISA-N

SMILES

Nc1ccn([C@@H]2O[C@H](CO)[C@@H](O)[C@H]2O)c(=O)n1

InChI

InChI=1S/C9H13N3O5/c10-5-1-2-12(9(16)11-5)8-7(15)6(14)4(3-13)17-8/h1-2,4,6-8,13-15H,3H2,(H2,10,11,16)/t4-,6-,7-,8-/m1/s1

Classification & relationships

ChEBI ontology

cytidinesChEBI parent class · 23524 ↗

nucleoside organic heterocyclic compound organic molecular entity

Roles recorded in ChEBI

antipsychotic agentantineoplastic agentophthalmology drugmouse metaboliteSaccharomyces cerevisiae metaboliteEscherichia coli metabolitehuman metabolite

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass

Amount

Input unit

Equivalent amount

0.00411152 mol

Uses 243.219 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions

C

Carbon · 9 atoms

44.45%

O

Oxygen · 5 atoms

32.89%

N

Nitrogen · 3 atoms

17.28%

H

Hydrogen · 13 atoms

5.39%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations

Two nucleoside uptake systems in Lactococcus lactis: competition between purine nucleosides and cytidine allows for modulation of intracellular nucleotide pools. ↗Journal of bacteriology · 2003 Mar · PMID 12591866

Taxonomic distribution and quantitative analysis of free purine and pyrimidine nucleosides in snake venoms. ↗Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology · 2005 Jan · PMID 15621516

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:17562

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

Additional molecular descriptorsNCBI PubChem · CID 6175 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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