Description

Calcium Dithionite is a powerful inorganic reducing agent with the CAS registry number 15512-36-4. This compound is valued for its strong reductive properties, making it essential in industrial processes where controlled chemical reduction is required. It is primarily utilized in sectors such as textile processing, water treatment, and pulp & paper manufacturing for bleaching and dechlorination applications.

Application

• Textile Bleaching & Stripping: Used as a reducing agent in vat dyeing and for stripping color from fabrics.
• Pulp & Paper Processing: Employed in bleaching sequences for chemical pulp to achieve high brightness.
• Water Treatment: Effective for dechlorination and removal of dissolved oxygen in boiler feed water and wastewater.
• Chemical Synthesis: Serves as a selective reducing agent in various organic and inorganic synthesis pathways.
• Food Industry (Technical Grade): Used in specific bleaching applications for food-grade starches and sugars.
• Soil Remediation: Applied in environmental cleanup to reduce and immobilize heavy metal contaminants.

Basic Information

Product Name	Calcium Dithionite
CAS No.	15512-36-4
Molecular Formula	CaO4S2 / CaS2O4
Molecular Weight	184.21 g/mol
Synonyms	Calcium Hydrosulfite; Calcium Sulfoxylate; Dithionous Acid, Calcium Salt; Calcium Dithionite; Blankit; Reductone; Vatrolite; Formosul
EINECS	239-552-5

Quality Control

Our Calcium Dithionite is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat and incompatible materials. Due to its hygroscopic and easily oxidized nature, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term stability. Keep container tightly sealed when not in use to minimize moisture absorption and oxidation.

Specification

Item	Specification
Appearance	White to yellowish crystalline powder
Identification (IR)	Conforms
Assay (as CaS2O4)	Min. 85%
Water Insolubles	Max. 0.5%
Iron (Fe)	Max. 50 ppm
Heavy Metals (as Pb)	Max. 20 ppm
pH (5% Solution)	5.0 - 7.5

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