Chemical substance record

Ammonium thiosulfate

7783-18-8₂H₄N.O₃S₂148.209 g/mol

Salt and Compound WithChEBI source record

An inorganic ammonium salt composed of ammonium and thiosulfate ions in a 2:1 ratio. It is used in the leaching of gold and silver, as a fertilizer and as a photographic fixing salt. — ChEBI

Safety references

Safety documents & references

Supplier matching matters

Find the safety document for your specific supplier, product number and grade.

Find a product-specific SDS

Search SDS PDFs Sigma-Aldrich Thermo Fisher

Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.

Identity & molecular properties

Source-linked values

CAS number	7783-18-8	ChEBI ↗
Molecular formula	₂H₄N.O₃S₂	ChEBI ↗
Molar mass	148.209 g/mol	ChEBI ↗
Monoisotopic mass	147.99763 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:147402	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	148.21 g/mol	PubChem ↗
Exact mass	147.99763447 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

Copy any identifier

Source preferred name

ammonium thiosulfate

IUPAC name

diammonium sulfurothioate

InChIKey

XYXNTHIYBIDHGM-UHFFFAOYSA-N

SMILES

O=S(=O)([O-])[S-].[NH4+].[NH4+]

InChI

InChI=1S/2H3N.H2O3S2/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)

Names & synonyms

diammonium sulfurothioateThio-Sul

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

Classification & relationships

ChEBI ontology

inorganic ammonium saltChEBI parent class · 147406 ↗

inorganic salt inorganic molecular entity

Roles recorded in ChEBI

herbicide safenerbleaching agentfertilizerreducing agent

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

0.00674723 mol

Uses 148.209 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Research & patent references

Selected source associations

The mechanism of excretion of ammonium thiosulfate. ↗Bulletin of the Johns Hopkins Hospital · 1947 Jul · PMID 20259527

The mechanism of excretion of ammonium thiosulfate. ↗Bulletin of the Johns Hopkins Hospital · 1947 Sep · PMID 20264759

Search PubMed Google Scholar

Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:147402

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

Additional molecular descriptorsNCBI PubChem · CID 6096946 · 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.

How this record was assembled Suggest a correction