Description

Magnesium Sulfite is an inorganic salt with significant utility in industrial and specialty chemical processes. Its primary value lies in its role as a reducing agent and sulfur source, making it a critical component in applications requiring controlled chemical reactivity. This compound is essential for manufacturers and processors in sectors such as water treatment, pulp and paper production, and specialty chemical synthesis. We supply high-purity Magnesium Sulfite CAS NO 7757-88-2 to meet the stringent quality demands of global B2B markets.

Application

• Pulp and Paper Industry: Used as a bleaching agent and an oxygen scavenger in the sulfite pulping process to improve pulp brightness and strength.
• Water Treatment: Acts as a dechlorination agent and oxygen scavenger in boiler feed water and wastewater treatment systems to prevent corrosion.
• Chemical Synthesis: Serves as a precursor and sulfur source in the manufacture of other magnesium and sulfur-containing compounds.
• Food Preservation (Technical Grade): Employed in specific applications as an antioxidant and preservative, subject to compliance with local food-grade regulations.
• Agricultural Applications: Used as a magnesium and sulfur nutrient supplement in certain fertilizer formulations and soil amendments.
• Pharmaceutical Intermediates: Functions as a reagent in the synthesis of certain active pharmaceutical ingredients (APIs) where high-purity grades are required.

Basic Information

Product Name	Magnesium Sulfite
CAS No.	7757-88-2
Molecular Formula	MgSO3
Molecular Weight	104.37 g/mol
Synonyms	Magnesium sulphite; Sulfurous acid, magnesium salt (1:1); Magnesium sulfite anhydrous; Magnesium(II) sulfite; EINECS 231-824-0
EINECS	231-824-0

Quality Control

Our Magnesium Sulfite is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. We provide Certificates of Analysis (COA) with every shipment, detailing key parameters such as assay, impurity profiles, and physical characteristics. Our quality commitment ensures reliable performance and batch-to-batch consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. For long-term storage, consider using desiccants or an inert atmosphere to minimize oxidation.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (MgSO3)	≥ 95.0 %
Loss on Drying	≤ 2.0 %
Water Insoluble Matter	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
Chloride (Cl)	≤ 0.1 %

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