CAS 7772-98-7 Sodium thiosulfate concentrate

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Sodium thiosulfate concentrate

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Catalog Number

ACM7772987-1

CAS Number

7772-98-7

Product Name

Sodium thiosulfate concentrate

Structure

Category

Salt

Description

DryPowder; DryPowder, Liquid; DryPowder, PelletsLargeCrystals; GasVapor; Liquid; OtherSolid; PelletsLargeCrystals;COLOURLESS CRYSTALS.

IUPAC Name

disodium;dioxido-oxo-sulfanylidene-ж╦6-sulfane

Molecular Weight

158.11g/mol

Molecular Formula

Na2O3S2;Na2S2O3;Na2O3S2

Canonical 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

Melting Point

48.5 °C

Density

1.667;1.7 g/cm³

Solubility

PRACTICALLY INSOL IN ALCOHOL;50 G SOL IN 100 CC WATER; 231 G @ 100 °C;Solubility in water, g/100ml at 20 °C: 20.9

Application

Sodium thiosulfate concentrate serves a variety of important functions across multiple industries due to its unique chemical properties. Primarily, it is used as a fixing agent in the photography and printing industries, where it effectively dissolves silver halides to stabilize photographic images. This compound is also a medium-strength reducing agent involved in several industrial processes, including the treatment of textiles and paper, where it acts as a dechlorination agent and a mordant. In the medical field, sodium thiosulfate is employed as an antidote for cyanide poisoning and as a fungicide and dechlorinating agent in water treatment. Additionally, it serves as a crucial component in the extraction of silver from ore and is used in tanning and analytical chemistry applications. Leveraging its ability to form stable complexes with certain metals, sodium thiosulfate continues to be an essential substance for creating stable photographic baths and facilitating various redox reactions.

Color/Form

POWDER;COLORLESS MONOCLINIC CRYSTALS

Complexity

82.6

Covalently-Bonded Unit Count

EC Number

231-867-5

Exact Mass

157.908425g/mol

Formal Charge

Heavy Atom Count

ICSC Number

1138

Log P

-4.35 (calculated)

MeSH Entry Terms

pentahydrate of sodium thiosulfate;sodium thiosulfate;sodium thiosulfate (USAN);sodium thiosulfate anhydrous;sodium thiosulfate pentahydrate;thiosulfuric acid, disodium salt

Monoisotopic Mass

157.908425g/mol

Refractive Index

INDEX OF REFRACTION: 1.489 ALPHA, 1.508 BETA, 1.536 GAMMA; OPTIC SIGN +

Rotatable Bond Count

RTECS Number

XN6476000

UNII

L0IYT1O31N

Vapor Pressure

Vapor pressure at 20 °C: negligible

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