Sodium metabisulfite Na₂S₂O₅

Grade: Food Grade & Industrial Grade Chemical Formula: Na₂S₂O₅ Molecular Weight: 190.103 CAS No.: 7681-57-4 Appearance: White or slightly yellow crystalline powder Relative Density: 1.4 Solubility: Dissolves in water (54g/100ml at 20°C; 81.7g/100ml at 100°C), soluble in glycerol, slightly soluble in ethanol Stability: Moisture sensitive, oxidizes to sodium sulfate in air; decomposes at 150°C; reacts with strong acids to release SO₂ Sodium Bisulfite (calculated as Na₂S₂O₃) Content: ≥ 96.5% Iron (Fe) Content: ≤ 0.003%