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Chemical substance record

Sodium thiosulfate pentahydrate

10102-17-7₅H₂O.₂Na.O₃S₂248.186 g/mol

Salt and Compound WithChEBI source record

A hydrate consisting of sodium thiosulfate with 5 mol eq. of water. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	10102-17-7	ChEBI ↗
Molecular formula	₅H₂O.₂Na.O₃S₂	ChEBI ↗
Molar mass	248.186 g/mol	ChEBI ↗
Monoisotopic mass	247.96125 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:32150	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	248.19 g/mol	PubChem ↗
Exact mass	247.96124818 Da	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

sodium thiosulfate pentahydrate

IUPAC name

sodium sulfurothioate--water (1/5)

InChIKey

PODWXQQNRWNDGD-UHFFFAOYSA-L

SMILES

O=S(=O)([O-])[S-].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Na+].[Na+]

InChI

InChI=1S/2Na.H2O3S2.5H2O/c;;1-5(2,3)4;;;;;/h;;(H2,1,2,3,4);5*1H2/q2*+1;;;;;;/p-2

Names & synonyms

PEDMARKsodium sulfurothioate--water (1/5)

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

hydrateChEBI parent class · 35505 ↗

hydrate

Roles recorded in ChEBI

nephroprotective agentantifungal drugantidote to cyanide poisoning

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

0.00402924 mol

Uses 248.186 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Research & patent references

Selected source associations

Promoting Effect of Crystal Water Leading to Catalyst-Free Synthesis of Heteroaryl Thioether from Heteroaryl Chloride, Sodium Thiosulfate Pentahydrate, and Alcohol. ↗The Journal of organic chemistry · 2019 Sep 6 · PMID 31393123

Sodium Thiosulfate: Pediatric First Approval. ↗Paediatric drugs · 2023 Mar · PMID 36517667

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:32150

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

Additional molecular descriptorsNCBI PubChem · CID 61475 · 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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