Global Acid Raw Materials & Salts Supplier
Detailed Info
| Sodium Metabisulfite Product Quality Indicators | ||
| Analysis items | Specification | |
| Food Grade | Industrial Grade | |
| Purity | ≥99.0% | ≥98.0% |
| Total Alkali (Calculated as NaHCO₃) | 99.0–100.5% | 98.0–101.0% |
| pH Value (10g/L Solution) | ≤8.6 | ≤8.8 |
| Whiteness | ≥85% | ≥80% |
| Moisture | ≤0.20% | ≤0.50% |
| Heavy Metals (Calculated as Pb) | ≤5 mg/kg | ≤10 mg/kg |
| Chlorides (Calculated as Cl) | ≤0.10% | ≤0.20% |
| Sulfates (Calculated as SO₄) | ≤0.02% | ≤0.05% |
| Iron (Calculated as Fe) | ≤10 ppm | ≤20 ppm |
| Arsenic (Calculated as As) | ≤1 mg/kg | ≤3 mg/kg |
| Insoluble in Water | ≤0.05% | ≤0.10% |
Application Scope
1、Bleaching Preservative: Add 0.05% – 0.3% to preserved fruits and dried fruits, residual SO₂ ≤ 0.1g/kg (Chinese Standard).
2、Beer Stabilizer: Inhibit fermentative bacteria, add 0.005% – 0.01%.
3、Bleaching Auxiliary: Use 3% – 5% for cotton fabric treatment, whiteness increased by 30%.
4、Electroplating Reducing Agent: Add 5% – 8% to acidic plating solution, improve coating bonding strength.
5、Wastewater Treatment: Heavy metal ion reduction efficiency reaches 95% (pH 2-3 conditions).
【Label Description】
Food Grade Sodium Metabisulfite, Industrial Grade Sodium Metabisulfite
