Description

Sodiumthiosulfate99%Min,Cas CAS NO 7772-94-7 is a high-purity inorganic salt widely recognized for its potent reducing and complexing properties. This compound is essential for industries requiring reliable and consistent chemical performance for critical processes. It is a fundamental material for water treatment, photographic development, leather processing, and analytical chemistry applications.

Application

• Photographic Fixing Agent: Used to dissolve unexposed silver halides from photographic films and papers.
• Water Dechlorination: Neutralizes chlorine and chloramines in municipal water, wastewater, and aquaculture systems.
• Leather & Textile Processing: Acts as an antichlor after bleaching and in chrome tanning processes.
• Analytical Chemistry (Iodometry): A standard titrant for the quantitative analysis of iodine and oxidizing agents.
• Gold Mining (Cyanide Detoxification): Used to neutralize residual cyanide in gold extraction tailings.
• Medical Antidote: Employed as an antidote for cyanide poisoning and in certain topical treatments for skin conditions.
• Bleaching & Paper Industry: Serves as a bleaching agent and a stabilizer in pulp and paper manufacturing.

Basic Information

Product Name	Sodiumthiosulfate99%Min,Cas CAS NO 7772-94-7
CAS No.	7772-94-7
Molecular Formula	Na2S2O3
Molecular Weight	158.11 g/mol
Synonyms	Sodium Thiosulfate; Sodium Hyposulfite; Hypo; Antichlor; Disodium Thiosulfate; Sodium Thiosulphate; Na2S2O3; Thiosulfuric Acid, Disodium Salt
EINECS	231-867-5

Quality Control

Our Sodium Thiosulfate is manufactured under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure it meets the specified 99% minimum purity and other critical parameters. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be kept away from moisture and incompatible materials such as strong acids.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (Na2S2O3)	≥ 99.0 %
pH (5% Solution)	6.0 - 8.0
Water Insoluble Matter	≤ 0.01 %
Sulfate & Sulfite (as SO4)	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.