Description

Aurio Sodium Thiosulphate is a versatile inorganic salt widely recognized for its reducing and complexing properties. Its primary commercial value lies in its ability to neutralize chlorine and other oxidizing agents, making it indispensable for water treatment and dechlorination processes. This compound is essential for industries ranging from photography and leather processing to analytical chemistry and environmental remediation. We supply high-purity grades to meet the stringent demands of global industrial and laboratory applications.

Application

• Water Treatment & Dechlorination: Neutralizes chlorine and chloramines in municipal water, wastewater, and industrial process streams.
• Photographic Industry: Acts as a fixing agent ("hypo") to dissolve unexposed silver halides from photographic films and papers.
• Leather & Textile Processing: Used in chrome tanning and as an antichlor agent to remove excess bleach from textiles.
• Analytical Chemistry: Serves as a titrant in iodometric titrations for the quantitative analysis of oxidizing agents.
• Gold Mining & Extraction: Employed as a less-toxic alternative to cyanide for leaching gold from ores.
• Pharmaceuticals: Used in certain medicinal formulations and as a neutralizing agent for cytotoxic drugs.
• Pulp & Paper Industry: Applied in bleaching sequences to quench residual oxidizing chemicals.
• Consumer Products: Found in some bath salts and neutralizers for hair color treatments.

Basic Information

Product Name	Aurio Sodium Thiosulphate
CAS No.	38295-16-8
Molecular Formula	Na2S2O3
Molecular Weight	158.11 g/mol (Anhydrous)
Synonyms	Sodium Thiosulfate; Sodium Hyposulfite; Hypo; Antichlor; Disodium Thiosulfate; Sodium Thiosulphate Pentahydrate; Thiosulfuric Acid, Disodium Salt; "Fixer" Salt
EINECS	Contact for details

Quality Control

Our Aurio Sodium Thiosulphate is manufactured under strict quality management systems to ensure batch-to-batch consistency and reliability. We offer various grades, including Industrial, Technical, and high-purity ACS/Reagent grades, each meeting defined specifications. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are provided with every shipment to guarantee compliance with your process requirements.

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); ensure the container is kept tightly sealed after each use to prevent caking and degradation due to absorption of atmospheric moisture. Keep away from strong acids.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (Na2S2O3)	≥ 98.0% - 99.5%
pH (5% Solution)	6.0 - 8.0
Water Insoluble Matter	≤ 0.01%
Sulfate (SO4)	≤ 0.1%
Sulfide (S)	≤ 10 ppm
Heavy Metals (as Pb)	≤ 10 ppm

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