| Property | Specification |
| Appearance | Granular, light brown to grayish |
| Bulk Density | 0.8 – 1.0 g/cm³ |
| Moisture Content | < 10% |
| Loss on Ignition | 12 – 18% |
| Particle Size | 0.1 – 3.0 mm |
| pH (1% Suspension) | 7.5 – 9.5 |
| Swelling Index | ≥ 20 ml/2g |
| Cation Exchange Capacity | 50 – 100 meq/100g |
| Ash Content | 10 – 20% |
| Oil Absorption | 35 – 50 ml/100g |