| Specification: (%) | ||
| High-grade | First-grade | |
| Assay (LiF) | 99.0 min | 98.5 min |
| Free acid (HF) | 0.02 max. | 0.02 max |
| Sulfur (S) | 0.06 max | 0.06 max |
| Phosphor (P) | 0.01 max | 0.01 max. |
| Mercury (Hg) | 0.001max | 0.001 max |
| Iron (Fe2O3) | 0.02 max. | 0.02 max. |
| Moisture (H2O) | 0.5 max | 0.5 max. |