Description

Dithionite CAS NO 14844-07-6 is a versatile inorganic reducing agent, also known as sodium dithionite, with significant commercial and industrial importance. Its powerful reductive properties make it essential for processes requiring controlled decolorization, bleaching, and chemical synthesis. This compound is a critical raw material for industries including textile processing, pulp and paper manufacturing, and fine chemical production, where reliable quality and consistent performance are paramount.

Application

• Textile Industry: Primary use as a reducing agent in vat dyeing and sulfur dyeing processes for cotton and other cellulose fibers.
• Pulp & Paper Manufacturing: Employed as a bleaching agent for mechanical pulp and for the reductive bleaching of groundwood pulp.
• Chemical Synthesis: Acts as a powerful reducing agent in organic synthesis for the reduction of nitro compounds, azo dyes, and peroxides.
• Water Treatment: Used for the reduction and removal of dissolved oxygen and heavy metals like chromium (VI) in industrial wastewater.
• Food Industry: Applied in specific food processing applications, such as the bleaching of certain food-grade starches.
• Clay & Mineral Processing: Utilized to improve the brightness of kaolin clay and other industrial minerals through reductive bleaching.
• Leather Processing: Assists in the bleaching and conditioning of leather hides.
• Photography: Used in some photographic developing solutions as a reducing agent.

Basic Information

Product Name	Dithionite
CAS No.	14844-07-6
Molecular Formula	Na2S2O4
Molecular Weight	174.11 g/mol
Synonyms	Sodium Dithionite; Sodium Hydrosulfite; Hydrosulfite; Blankit; Vatrolite; Reductone; Dithionous Acid, Disodium Salt; Sodium Sulfoxylate
EINECS	238-896-5

Quality Control

Our Dithionite is manufactured under stringent quality management systems to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical testing, including assay, impurity profiling, and physical property determination. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee compliance with your technical requirements and industry standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat, sparks, and open flame. Due to its hygroscopic and easily oxidized nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to prevent moisture absorption and decomposition. Recommended storage temperature is 15-25°C. Keep away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Na2S2O4)	≥ 88.0 %
Water Insolubles	≤ 0.2 %
Iron (Fe)	≤ 20 ppm
Heavy Metals (as Pb)	≤ 10 ppm
pH (1% Solution)	5.5 - 7.5

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