Reference Standard
| CAS Number | 1429071-63-5 (F), 1429071-65-7 (G) |
| Formula | C₃₂H₃₉NO₃ |
| Molecular Weight | ~485.66 g/mol |
| Purity | Qualified mixture as per EP specification |
| Storage | 2–8 °C |
Mixture of cis- and trans-N-oxide impurities (F & G) used when chromatographic separation is difficult.
System suitability, impurity quantitation in ebastine API.
HPLC peak resolution study, LC-MS confirmation.
