Description

Potassium Sulfite is an inorganic salt widely recognized for its potent reducing and antioxidant properties. This compound is essential for controlling oxidation and preserving product integrity across various industrial processes. Key industries that rely on this material include food and beverage production, water treatment, and photographic development, where it acts as a crucial preservative and oxygen scavenger.

Application

• Food & Beverage Preservation: Used as an antioxidant and preservative (E225) in wines, beers, fruit juices, and dried fruits to prevent spoilage and maintain color.
• Water Treatment: Acts as an effective oxygen scavenger in boiler feed water and industrial water systems to prevent corrosion.
• Photographic Industry: Serves as a developing agent and preservative in photographic solutions and film processing.
• Chemical Synthesis: Employed as a reducing agent and sulfonating agent in various organic synthesis and pharmaceutical manufacturing processes.
• Textile & Leather Processing: Used in bleaching and dechlorination stages to improve material quality and processing efficiency.
• Pulp & Paper Manufacturing: Functions as a bleaching agent and antichlor to remove excess chlorine after the bleaching process.

Basic Information

Product Name	Potassium Sulfite
CAS No.	10117-38-1
Molecular Formula	K2SO3
Molecular Weight	158.26 g/mol
Synonyms	Dipotassium sulfite; Sulfurous acid, dipotassium salt; Potassium sulphite; E225; Caswell No. 702; Dipotassium trioxosulfate; UNII-1U1QTN40SY; Kaliumsulfit
EINECS	233-321-1

Quality Control

Our Potassium Sulfite is manufactured under a stringent quality management system. We provide material that can meet various grade specifications, including Food Grade (FCC) and Technical Grade. Every batch is tested to ensure compliance with relevant purity and safety standards. A Certificate of Analysis (COA) detailing key parameters is available for all shipments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials. Due to its hygroscopic and easily oxidized nature, it is recommended to store under an inert atmosphere or in moisture-proof packaging for long-term stability. Keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as K2SO3)	≥ 95.0%
pH (5% solution)	8.0 - 10.5
Water Insolubles	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Selenium (Se)	≤ 30 ppm

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