Thiosulfate(2-)
A divalent inorganic anion obtained by removal of both protons from thiosulfuric acid. — ChEBI
Safety documents & references
Supplier matching mattersFind the safety document for your specific supplier, product number and grade.
Find a product-specific SDS
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 | 14383-50-7 | ChEBI ↗ |
| Molecular formula | O3S2 | ChEBI ↗ |
| Molar mass | 112.131 g/mol | ChEBI ↗ |
| Monoisotopic mass | 111.92998 Da | ChEBI ↗ |
| Formal charge | -2 | ChEBI ↗ |
| ChEBI identifier | CHEBI:16094 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 112.13 g/mol | PubChem ↗ |
| Exact mass | 111.92888620 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 identifierthiosulfate(2-)sulfurothioateDHCDFWKWKRSZHF-UHFFFAOYSA-LO=S(=O)([O-])[S-]InChI=1S/H2O3S2/c1-5(2,3)4/h(H2,1,2,3,4)/p-2Names & synonyms
Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.
Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
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 massUses 112.131 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsSOCalculated 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 associationsExplore literature using this exact identifier.
Sources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
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.