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.
Water Treatment
Used as a reducing agent for dechlorination and removal of residual oxidizing agents from water.
Food & Seafood Processing
Used as a preservative and antioxidant in permitted food applications, including selected seafood processing.
Textile Industry
Used as a reducing and bleaching-process aid in textile processing and dyeing.
Pulp & Paper Industry
Used in selected bleaching and chemical-processing applications in pulp and paper production.
Mining & Mineral Processing
Used as a reducing agent and process reagent in selected mineral-processing operations.
Chemical & Pharmaceutical Processing
Used as a reducing agent and preservative in selected industrial and pharmaceutical formulations.
