# Benzenesulfinic acid, sodium salt

CAS: 873-55-2
PubChem CID: 2723840
InChIKey: CHLCPTJLUJHDBO-UHFFFAOYSA-M
Wikidata: Q72507714
Molecular formula: C₆H₅NaO₂S
Molar mass: 164.16 g/mol
IUPAC: sodium benzenesulfinate
SMILES: C1=CC=C(C=C1)S(=O)[O-].[Na+]
InChI: InChI=1S/C6H6O2S.Na/c7-9(8)6-4-2-1-3-5-6;/h1-5H,(H,7,8);/q;+1/p-1
PSA: 59.3 A^2
Hydrogen bond donors: 0
Hydrogen bond acceptors: 3
Rotatable bonds: 1
Heavy atoms: 10
3D structure: 15 atoms, 15 bonds

## About the compound

Benzenesulfinic acid, sodium salt is a chemical compound registered under CAS number 873-55-2. Molecular formula: C₆H₅NaO₂S. Molar mass: 164.16 g/mol. The full systematic IUPAC name is: sodium benzenesulfinate. The molecule contains 15 atoms connected by 15 chemical bonds. 
Chemical data comes from the PubChem (NIH), ChEMBL (EBI) and NIST WebBook databases. GHS statement translations comply with the CLP Regulation (EC 1272/2008). Interactive 3D model and 2D skeleton available at: https://molgod.org/molecule/873-55-2/


## Synonyms

  - BENZENESULFINIC ACID, SODIUM SALT
  - Benzenesulfinic acid, sodium salt (1:1)
  - RefChem:1078624
  - DTXCID3048576
  - Sodium phenylsulfinate
  - Sodium benzenesulphinate
  - sodium;benzenesulfinate
  - C6H5NaO2S
  - sodium benzene sulfinate
  - sodiumphenylsulfinate
  - PhSO2Na
  - sodium phenylsulphinate

## Data sources

  - PubChem CID 2723840: https://pubchem.ncbi.nlm.nih.gov/compound/2723840
  - Wikidata: https://www.wikidata.org/wiki/Q72507714
  - NIST WebBook: https://webbook.nist.gov/cgi/cbook.cgi?ID=873-55-2
  - ChEMBL: https://www.ebi.ac.uk/chembl/g/#search_results/all/query=873-55-2

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Last updated: 2026-10-17
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