Minimum percentage of analytical purity (expressed to one decimal point) | Limit of variation Per cent |
|---|---|
| 99.9–100 | 0.2 |
| 99.7–99.8 | 0.4 |
| 99.5–99.6 | 0.5 |
| 99.3–99.4 | 0.6 |
| 99.0–99.2 | 0.7 |
| 98.8–98.9 | 0.8 |
| 98.3–98.7 | 0.9 |
| 98.0–98.2 | 1.0 |
| 97.5–97.9 | 1.1 |
| 97.0–97.4 | 1.2 |
| 96.5–96.9 | 1.3 |
| 96.0–96.4 | 1.4 |
| 95.0–95.9 | 1.5 |
| 94.0–94.9 | 1.6 |
| 93.0–93.9 | 1.7 |
| 92.0–92.9 | 1.9 |
| 91.0–91.9 | 2.0 |
| 90.0–90.9 | 2.1 |
| 88.0–89.9 | 2.2 |
| 86.0–87.9 | 2.4 |
| 84.0–85.9 | 2.5 |
| 82.0–83.9 | 2.6 |
| 80.0–81.9 | 2.8 |