Description

Metabisulfite is a versatile inorganic salt widely used as a powerful reducing agent, antioxidant, and preservative. Its primary commercial value lies in its ability to inhibit oxidation and microbial growth, thereby extending the shelf life and stability of various products. This makes it an essential chemical for industries such as food and beverage, water treatment, pharmaceuticals, and textile processing. We supply high-purity Metabisulfite CAS NO 23134-05-6 to meet the stringent demands of global industrial applications.

Application

• Food & Beverage Preservation: Used as an antioxidant and antimicrobial agent in wines, beers, dried fruits, and fruit juices to prevent spoilage and browning.
• Water Treatment: Acts as a dechlorination agent and oxygen scavenger in municipal and industrial water systems, including boiler feed water.
• Pharmaceutical Manufacturing: Serves as an excipient and reducing agent in certain drug formulations to enhance stability.
• Textile & Leather Processing: Employed as a bleaching agent and antichlor in the textile industry to remove excess chlorine after bleaching.
• Photographic Industry: Used in developing solutions as a reducing agent.
• Chemical Synthesis: Functions as a sulfonating or sulfiting agent in various organic synthesis processes.
• Mining & Metallurgy: Applied in gold recovery processes (cyanide detoxification) and as a flotation agent.
• Pulp & Paper Industry: Used in chemical pulping and as a bleaching agent.

Basic Information

Product Name	Metabisulfite
CAS No.	23134-05-6
Molecular Formula	Na2S2O5
Molecular Weight	190.11 g/mol
Synonyms	Sodium Metabisulfite; Sodium Pyrosulfite; Disodium Disulfite; Disodium Metabisulfite; Sodium Disulfite; E223; SMB; Na2S2O5
EINECS	205-739-4

Quality Control

Our Metabisulfite is manufactured under a strict quality management system. We offer grades compliant with key industry standards, including Food Chemical Codex (FCC) and Technical Grade specifications. Every batch undergoes rigorous analytical testing to ensure consistent purity, potency, and safety. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profiles, and physical parameters is available for each shipment.

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). This product is hygroscopic (moisture-sensitive) and must be kept in original packaging or a moisture-proof container to prevent caking and decomposition. Keep away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as Na2S2O5)	≥ 97.0 %
Iron (Fe)	≤ 10 ppm
Heavy Metals (as Pb)	≤ 10 ppm
Selenium (Se)	≤ 10 ppm
Water Insolubles	≤ 0.05 %
pH (5% Solution)	4.0 - 5.0

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