Sodium Metabisulfite (Na₂S₂O₅) is a white, crystalline powder commonly used as a reducing and preservative agent in various industries. It is widely employed in the food and beverage industry to preserve freshness and prevent spoilage, as well as in water treatment processes to remove unwanted chemicals. Additionally, it is used in photography, textiles, and as a cleaning agent in industrial applications. Sodium Metabisulfite’s effectiveness in maintaining product quality and safety makes it a valuable component in multiple sectors.
Test Parameter | Specification | Result |
Appearance | White Crystalline Powder | Complies |
Purity | ≥ 98% | 98.7% |
Water Content | ≤ 2% | 1.5% |
pH (5% solution) | 4.0 - 5.0 | 4.5 |
Heavy Metals | ≤ 10 ppm | < 5 ppm |
Arsenic | ≤ 1 ppm | < 0.5 ppm |
Lead | ≤ 1 ppm | < 0.5 ppm |