Tamoxifen EP Impurity D Oxalate (Mixture of Z and E Isomers) CAS CATO-C4X-123314
| CAS No. | CATO-C4X-123314 |
| Molecular Formula | C25H27NO |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Tamoxifen EP Impurity D Oxalate (Mixture of Z and E Isomers) is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 447.53 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a process- or degradation-related impurity, Tamoxifen EP Impurity D Oxalate (Mixture of Z and E Isomers) (CAS CATO-C4X-123314, C25H27NOC2H2O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C25H27NO C2H2O4 |
| Molecular Weight | 447.53 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Tamoxifen Standards
- Tamoxifen (CAS 10540-29-1)
- Tamoxifen Citrate Impurity 25 (CAS 114828-90-9)
- Tamoxifen Impurity 18 (CAS 123091-15-6)
- Tamoxifen EP Impurity A (CAS 13002-65-8)
- Tamoxifen Dimer (CAS 1346606-51-6)
- Tamoxifen Impurity 15 (CAS 157698-32-3)
- Tamoxifen Citrate EP Impurity D Hydrochloride(E-Isomer) (CAS 15917-51-8)
- Tamoxifen EP Impurity F HCl (CAS 15917-65-4)
Recommended Standards
- Ilaprazole Impurity 237 (CAS CATO-C4X-1130237)
- Triclopyr impurity C (CAS CATO-CCPD103606)
- Mirogabalin Impurity N59 (CAS 1415817-43-4)
- 3-(2-(Piperidin-4-yl)ethyl)-1H-indole hydrochloride (CAS 63845-42-1)
- 2-(4-Butoxy-3-chlorophenyl)ethan-1-amine hydrochloride (CAS 56121-92-7)
- Dacomitinib Impurity 2 (CAS CATO-C4X-20862)
- Tert-butyl 4-[2,5-difluoro-4-(methoxycarbonyl)phenyl]piperazine-1-carboxylate (CAS 2205504-87-4)
- tert-Butyl (R)-2-(pyrrolidin-3-yl)acetate (CAS 1673553-59-7)
- Endosulfan-Lacton (CAS 3868-61-9)
- Neuropeptide W-23 (rat) (CAS 383415-89-2)
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