Description

Magnesium Bisulfite is an inorganic chemical compound widely utilized as a reducing agent and preservative across multiple industries. Its primary commercial value lies in its ability to prevent oxidation and inhibit microbial growth, thereby extending the shelf life and stability of various products. Key industrial users include manufacturers in the pulp and paper, water treatment, and food processing sectors, where it serves critical functions in bleaching, dechlorination, and as an antimicrobial agent.

Application

• Pulp and Paper Industry: Used as a bleaching agent and an oxygen scavenger in the chemical pulping process to improve pulp brightness and strength.
• Water Treatment: Acts as a powerful dechlorination agent and oxygen scavenger in boiler feed water and wastewater treatment to prevent corrosion.
• Food Preservation: Employed as an antimicrobial and antioxidant preservative, particularly in the processing of fruits, vegetables, and seafood.
• Textile Industry: Serves as a reducing agent in dyeing and printing processes to improve color fastness and fabric quality.
• Chemical Synthesis: Functions as a sulfonating or reducing agent in various organic synthesis reactions.
• Photography: Used in developing solutions as a preservative to stabilize the chemical bath.

Basic Information

Product Name	Magnesium Bisulfite
CAS No.	13774-25-9
Molecular Formula	Mg(HSO3)2 or H2MgO6S2
Molecular Weight	186.45 g/mol
Synonyms	Magnesium hydrogen sulfite; Magnesium disulfite; Magnesium sulfonate; Bisulfite de magnesium; Magnesium acid sulfite; Sulfurous acid, magnesium salt (1:?); EINECS 237-411-6
EINECS	237-411-6

Quality Control

Our Magnesium Bisulfite is produced 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 relevant industrial standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) and easily oxidized nature, the container must be kept tightly sealed after each use. For long-term storage, consider using an inert atmosphere to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solution
Identification (IR)	Conforms
Assay (as Mg(HSO3)2)	Min. 95.0%
pH (1% Solution)	3.5 - 5.5
Water Insolubles	Max. 0.1%
Heavy Metals (as Pb)	Max. 10 ppm
Iron (Fe)	Max. 20 ppm

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