| Property | Specification | Test Method |
|---|---|---|
| Sodium Borate (Na₂B₄O₇ • 10H₂O) | ≥ 99.0% | Gravimetric analysis |
| Appearance | White crystalline powder or colorless crystals | Visual |
| Solubility in Water | Soluble | Solubility test |
| pH (5% solution) | 7.0 – 9.0 | Potentiometric method |
| Loss on Drying | ≤ 48.0% | Loss on drying at 105°C |
| Chloride (Cl) | ≤ 0.02% | Titrimetric method |
| Sulfate (SO₄) | ≤ 0.10% | Gravimetric method |
| Iron (Fe) | ≤ 0.005% | ICP-MS (Inductively Coupled Plasma Mass Spectrometry) |
| Calcium (Ca) | ≤ 0.10% | ICP-AES (Inductively Coupled Plasma Atomic Emission Spectroscopy) |
| Magnesium (Mg) | ≤ 0.02% | ICP-AES |
| Insoluble Matter | ≤ 0.10% | Gravimetric analysis |
