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| Glauber's salt (sodium sulfate decahydrate) is prismatic, rectangular, irregular block shaped, or granular. It is colorless, transparent or semi transparent, brittle and fragile, with a glassy luster on the cross section. Odorless and salty in taste. | |||||||||
7727-73-3
Boss Chemical
7727-73-3
| Property | Specification |
|---|---|
| Melting Point | 32–38 °C |
| Density | 1.46 g/mL at 25 °C (lit.) |
| Bulk Density | 700 kg/m³ |
| Storage Conditions | Store at +15 °C to +25 °C |
| Solubility in Water | 1 M at 20 °C, clear, colorless |
| Form | Solid |
| Color | White |
| Specific Gravity | 1.46 |
| pH Value | 5.2–8.0 (50 g/L, H₂O, 25 °C) (anhydrous substance) |
| Water Solubility | Soluble in water and glycerin. Insoluble in ethanol and methanol. |
| UV Absorbance (λmax) | λ: 260 nm, Amax: ≤ 0.025λ: 280 nm, Amax: ≤ 0.021 |
| Merck | 14, 8680 |
| Stability | Stable. Incompatible with strong acids, aluminum and magnesium. |
| Inspection Item | Specification | Test Result | Conclusion |
|---|---|---|---|
| Appearance | Colorless or white transparent granular crystals | White crystals | Qualified |
| Assay (Na₂SO₄, dried basis) | ≥ 99.0% | 99.60% | Qualified |
| Loss on Drying (Water content) | 51.0% – 57.0% | 55.20% | Qualified |
| pH Value (5% aqueous solution, 25℃) | 5.0 – 8.0 | 6.70 | Qualified |
| Insoluble Matter | ≤ 0.01% | 0.005% | Qualified |
| Chloride (Cl⁻) | ≤ 0.005% | Complies | Qualified |
| Heavy Metals (as Pb) | ≤ 0.001% | Complies | Qualified |
| Iron (Fe) | ≤ 0.001% | Complies | Qualified |
| Water Solubility | Clear solution (10% aqueous solution) | Clear | Qualified |
