Absorbance (mean ± SD) of reference suspensions for the limpidity test according to European Pharmacopoeia 7th ed, test 2.2.1.
| Absorbance at (nm) | |||
|---|---|---|---|
| Category of reference suspension | 350 | 550 | Aspect of solution |
| I | 0.017±0.002 | 0.007±0.001 | Clear |
| II | 0.032±0.003 | 0.014±0.002 | Slightly opalescent |
| III | 0.085±0.001 | 0.035±0.001 | Opalescent |
| IV | 0.144±0.005 | 0.059±0.003 | Very opalescent |
From Mahler et al39.