| Property | Specification |
| Form | Lump / Briquette / Powder |
| Color | Black to dark gray |
| Odor | Odorless or slight smoky aroma (no chemical additives) |
| Moisture Content | Max 5–8% |
| Fixed Carbon Content | 65–85% (higher for good-quality charcoal) |
| Ash Content | Max 3–6% (depending on wood source) |
| Volatile Matter | 10–20% |
| Calorific Value | 7000–8000 kcal/kg (approx.) |
| Density | 0.3–0.6 g/cm³ (varies with type) |
| Burning Time | Long-burning (1–3 hours depending on size and type) |
| Hardness | High (should resist crumbling during handling) |
| Impurities | Minimal; free from soil, plastic, or unburnt wood |
