| La especificación | GB 25587-2010 | FCC VII. |
| Contenido (MgO), w /% | 40.0-44.0 | 40.0-43.5 |
| El equilibrio ácido-sustancias insolubles , w /% ≤ | 0.05 | 0.05 |
| Los metales pesados Pb(as ) , w /% ≤ | 0.001 | ---- |
| CaO, w /% ≤ | 0.6 | 0.6 |
| Las sales solubles, w /% ≤ | 1.0 | 1.0 |
| Pb, mg/kg ≤ | ---- | 2.0 |
| ( As ) , mg/kg ≤ | 3 | ---- |