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Home/Compounds/Industrial Chemical/Sodium thiosulfate
Na2O3S2
158.11 g/mol
Industrial Chemical

SODIUM THIOSULFATE

CAS7772-98-7EC231-867-5
Category
Industrial Chemical
Compound Class
Inorganic Salt
Primary Use
Antichlor in paper pulp bleaching

Sodium thiosulfate is a chemical compound primarily used as an antichlor in paper pulp bleaching to neutralize residual chlorine. It is also applied in photographic processing, leather tanning, and wastewater treatment.

antichlor in paper pulp bleachingphotographic processingleather tanning and processing

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Related Compounds

StrongSame Parent

Ammonium thiosulfate

CAS7783-18-8

Fungicide and fertilizer

StrongSame Parent

Sodium thiosulfate pentahydrate

CAS10102-17-7

Photographic fixing agent

StrongSame Parent

Calcium thiosulfate

CAS10124-41-1

Fungicide in crop protection

StrongSame Parent

Magnesium thiosulfate

CAS10124-53-5

Soil amendment fertilizer

ReferenceSame Category

Sodium chlorate

CAS7775-09-9

oxidizer in pulp and paper processing

ReferenceSame Category

Sodium dithionite

CAS7775-14-6

reducing agent for textile dyeing and bleaching

ReferenceSame Category

Sodium metaborate

CAS7775-19-1

Intermediate in borax manufacture

ReferenceSame Category

Sodium persulfate

CAS7775-27-1

Bleaching and oxidizing agent

Customs Tariff Classification

The international HS code for SODIUM THIOSULFATE (CAS 7772-98-7) is 2832.30.

HS code (international, 6-digit)

2832.30

EU CN code (8-digit)

2832 30 00

Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers
IUPAC Name

disodium;dioxido-oxo-sulfanylidene-lambda6-sulfane

InChIKey

AKHNMLFCWUSKQB-UHFFFAOYSA-L

SMILES

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

Synonyms (50)
  • E-539
  • PEDMARK
  • USP Solution Sodium Thiosulfate 0.100 Normal (N/10) Conforms to USP
  • Ametox
  • Chlorine Control
  • Chlorine Cure
  • Cyanide Antidote Package
  • DISODIUM THIOSULPHATE
  • Declor-It
  • Disodium thiosulfate
  • Hypo
  • Hypo (VAN)
  • Hypo alcohol, in ethanol
  • Ins no.539
  • Natrii thiosulfas
  • S-Hydril
  • SODIUM THIOSULFATE
  • Sodium hyposulfite
  • Sodium oxide sulfide
  • Sodium subsulfite
  • Sodium thiosulfate (Na2S2O3)
  • Sodium thiosulfate, anhydrous
  • Sodium thiosulfate, p.a.
  • Sodium thiosulphate
  • Sodium thiosulphate (Na2S2O3)
  • Sodothiol
  • anhydrous sodium thiosulfate
  • disodium sulfurothioate
  • sodium thiosulfat
  • sulfothiorine

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