Reference Standard
| CAS Number | Not assigned |
| Formula | C₁₉H₁₉D₃ClNO |
| Molecular Weight | ~318.86 g/mol |
| Purity | Typically ≥98% (isotopic & chemical purity, COA ba |
| Storage | 2–8 °C, desiccated |
Deuterium-labeled hydrochloride salt of doxepin used for quantitative mass-spectrometric analysis.
LC-MS/MS internal standard, bioanalysis, pharmacokinetic studies.
MS isotopic pattern verification, HPLC purity, NMR (structural confirmation).
