Sodium thiosulfate

• CAS: 7772-98-7
• Catalog Number: ACM7772987
• Category: Metal & Ceramic Materials
• Molecular Weight: 158.11
• Molecular Formula: Na2O3S2;Na2S2O3;Na2O3S2
• Description: DryPowder; DryPowder, Liquid; DryPowder, PelletsLargeCrystals; GasVapor; Liquid; OtherSolid; PelletsLargeCrystals;COLOURLESS CRYSTALS.
• Synonyms: Sodium subsulfite
• IUPAC Name: Disodium;dioxido-oxo-sulfanylidene-λ6-sulfane
• SMILES: [O-]S(=O)(=S)[O-].[Na+].[Na+]
• InChI: InChI=1S/2Na.H₂O3S2/c;1-5(2,3)4/h;(H2,1,2,3,4)/q2*+1;/p-2
• InChI Key: AKHNMLFCWUSKQB-UHFFFAOYSA-L
• Boiling Point: 100 °C
• Melting Point: 48 °C
• Density: 1.01 g/mL at 25 °C (lit.)
• Solubility: Practically insoluble in alcohol
• Appearance: White solid
• Application: Sodium thiosulfate serves a multifaceted purpose across various fields due to its unique chemical properties. In the realms of photography and film, it is primarily employed as a fixing agent because of its ability to dissolve silver halides, a property first identified by Sir John Herschel in 1819. Beyond its photographic applications, sodium thiosulfate is utilized in medicine as an antidote for cyanide poisoning, and in water treatment as a dechlorination agent and fungicide. Its role extends further to the leather and textile industries, where it functions as a mordant and bleaching agent, and acts as a reducing agent in tanning processes. The compound's versatility is highlighted by its use in analytical chemistry for iodine quantification, and it also finds application in the extraction of silver from ore. Sodium thiosulfate's reductive capabilities make it a medium-strength reducing agent, facilitating redox reactions across various industrial processes. Produced from raw materials like soda ash and sulfur, it remains a vital chemical with applications that have stood the test of time, maintaining its significance since the 19th century.
• Storage: Store at +5 °C to +30 °C
• Color/Form: POWDER;COLORLESS MONOCLINIC CRYSTALS
• Complexity: 82.6
• Covalently-Bonded Unit Count: 3
• Decomposition: DANGEROUS; WHEN HEATED TO DECOMP, THEY EMIT HIGHLY TOXIC FUMES OF /DISODIUM OXIDE AND SULFUR OXIDES/.;300 °C
• EC Number: 231-867-5
• Exact Mass: 157.90842477
• Formal Charge: 0
• H-Bond Acceptor: 4
• H-Bond Donor: 0
• Heavy Atom Count: 7
• ICSC Number: 1138
• LogP: -4.35 (calculated)
• Monoisotopic Mass: 157.90842477
• Refractive Index: INDEX OF REFRACTION: 1.489 ALPHA, 1.508 BETA, 1.536 GAMMA; OPTIC SIGN +
• Rotatable Bond Count: 0
• RTECS Number: XN6476000
• Topological Polar Surface Area: 104 Ų
• UNII: L0IYT1O31N
• Vapor Pressure: Vapor pressure at 20 °C: negligible

Custom Q&A

What is the molecular formula of sodium thiosulfate?

The molecular formula of sodium thiosulfate is Na2O3S2.

What is the molecular weight of sodium thiosulfate?

The molecular weight of sodium thiosulfate is 158.11 g/mol.

What are the synonyms for sodium thiosulfate?

The synonyms for sodium thiosulfate include disodium thiosulfate, sodiumthiosulfate, and Sodothiol.

What is the IUPAC name of sodium thiosulfate?

The IUPAC name of sodium thiosulfate is disodium;dioxido-oxo-sulfanylidene-λ 6 -sulfane.

What is the InChI of sodium thiosulfate?

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

What is the InChIKey of sodium thiosulfate?

The InChIKey of sodium thiosulfate is AKHNMLFCWUSKQB-UHFFFAOYSA-L.

What is the CAS number of sodium thiosulfate?

The CAS number of sodium thiosulfate is 7772-98-7.

What is the UNII of sodium thiosulfate?

The UNII of sodium thiosulfate is L0IYT1O31N.

What is the ChEMBL ID of sodium thiosulfate?

The ChEMBL ID of sodium thiosulfate is CHEMBL3753202.

What is the NCI Thesaurus Code of sodium thiosulfate?

The NCI Thesaurus Code of sodium thiosulfate is C1230.