Sodium Metabisulphite

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PRODUCT SPECIFICATIONS

Test Description Test Method Unit of Measure Specification
Appearance Visual Inspection White to Off-White Crystalline Powder
Sodium Metabisulphite Content Iodometric Titration % w/w 97.0 Min
Sulphur Dioxide (SO₂) Iodometric Titration % w/w 65.0 – 67.4
Iron Applicable Standard ppm 10 Max
Heavy Metals Applicable Standard ppm 10 Max
Water Insoluble Matter Gravimetric Method % w/w 0.05 Max
pH (5% Solution) pH Meter 4.0 – 5.0
Moisture Loss on Drying % w/w 0.50 Max

SODIUM METABISULPHITE APPLICATIONS

Sodium Metabisulphite is a versatile reducing agent widely used in water treatment, food processing, textile and paper industries, mining and selected chemical-processing applications.

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Water Treatment

Used as a reducing agent for dechlorination and removal of residual oxidizing agents from water.

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Food & Seafood Processing

Used as a preservative and antioxidant in permitted food applications, including selected seafood processing.

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Textile Industry

Used as a reducing and bleaching-process aid in textile processing and dyeing.

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Pulp & Paper Industry

Used in selected bleaching and chemical-processing applications in pulp and paper production.

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Mining & Mineral Processing

Used as a reducing agent and process reagent in selected mineral-processing operations.

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Chemical & Pharmaceutical Processing

Used as a reducing agent and preservative in selected industrial and pharmaceutical formulations.