Description

Zinc Hydrosulfite is a powerful inorganic reducing agent with the CAS number 7779-86-4. This compound is critical for industrial processes requiring efficient and controlled reductive bleaching or stripping of colorants. It is an essential chemical for manufacturers in the textile, paper, and sugar industries who require reliable and consistent performance. Its strong reductive power makes it a key component for decolorization and purification applications.

Application

• Textile Industry: Primary use as a reducing agent for vat dyeing and as a stripping agent for color correction.
• Paper & Pulp Manufacturing: Used in the bleaching of mechanical pulps to improve brightness and whiteness.
• Sugar Refining: Employed as a decolorizing agent to purify and bleach sugar syrups.
• Clay & Kaolin Processing: Applied to bleach and enhance the brightness of mineral products.
• Chemical Synthesis: Serves as a reducing agent in various organic and inorganic chemical production processes.
• Wastewater Treatment: Utilized for the reduction and precipitation of heavy metals from industrial effluents.
• Food Industry (Indirect Applications): Used in equipment cleaning and purification processes in related manufacturing.

Basic Information

Product Name	Zinc Hydrosulfite
CAS No.	7779-86-4
Molecular Formula	ZnS2O4
Molecular Weight	193.50 g/mol
Synonyms	Zinc Dithionite; Zinc Sulfoxylate; Formosul Z; Blankit Z; Hydrosulfurous acid, zinc salt (1:1); Zinc Hydrosulphite
EINECS	231-943-8

Quality Control

Our Zinc Hydrosulfite is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high performance. The product is tested against rigorous internal specifications for key parameters such as active content, insolubles, and heavy metal impurities. Certificates of Analysis (COA) documenting purity and compliance are available for every shipment upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from heat and moisture sources. Due to its properties of being easily oxidized (store under inert atmosphere) and hygroscopic (moisture-sensitive), the container must be kept sealed under an inert atmosphere after opening. Store away from oxidizing agents and acids.

Specification

Item	Specification
Appearance	White to grayish-white crystalline powder
Assay (ZnS2O4)	Min. 85%
Zinc (Zn) Content	Contact for details
Iron (Fe)	Max. 0.005%
Insolubles in Water	Max. 0.5%
pH (Aqueous Solution)	Contact for details

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