Reference Standard
| CAS Number | Not assigned |
| Formula | As defined in European Pharmacopoeia (related coumarin derivative) |
| Molecular Weight | ~308–324 g/mol (approximate) |
| Purity | As per EP CRS specification |
| Storage | Store at 2–8 °C; protect from light |
EP Impurity A is a specified pharmacopoeial impurity of warfarin described in the European Pharmacopoeia.
Used for EP compliance testing and impurity quantification in warfarin API.
HPLC comparison with EP CRS, LC-MS confirmation.
