Tamoxifen EP Impurity G CAS 68047-07-4
| CAS No. | 68047-07-4 |
| Molecular Formula | C20H25NO2 |
| Molecular Weight | 311.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Tamoxifen EP Impurity G (CAS 68047-07-4, C20H25NO2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Tamoxifen EP Impurity G (C20H25NO2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 311.42 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C20H25NO2 |
| Molecular Weight | 311.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 1 |
Related Tamoxifen Standards
- Tamoxifen Impurity 21 (CAS CATO-C4X-123321)
- Tamoxifen Impurity 25 (CAS CATO-C4X-123325)
- Tamoxifen Citrate Impurity 9 (CAS 69967-80-2)
- Tamoxifen Impurity 30 (CAS CATO-C4X-123330)
- Tamoxifen Impurity 11 (CAS 5435-24-5)
- Tamoxifen EP Impurity C (CAS 19957-51-8)
- Tamoxifen EP Impurity C (CAS 97151-10-5)
- Tamoxifen Impurity 26 (CAS CATO-C4X-123326)
Recommended Standards
- Salbutamol Impurity 132 (CAS CATO-C4X-1176132)
- Hydrocortisone Impurity 38 (CAS 83196-56-9)
- 59859-58-4 8Y719ZLX8C Femoxetine Femoxetine [INN] (+)-trans-3-((p-Methoxyphenoxy)methyl)-1-methyl-4-phenylpiperidine Piperidine, 3-((4-methoxyphenoxy)methyl)-1-methyl-4-phenyl-, (3R-trans)- Femoxetina [INN-Spanish] Femoxetinum [INN-Latin] Femoxetina Femoxetinum UNII-8Y719ZLX8C (+)-Femoxetine (CAS 59859-58-4)
- Trihexyphenidyl Impurity 16 (CAS 2724762-69-8)
- Gadoteridol Impurity 19 (CAS CATO-C4X-225719)
- Alogliptin Impurity 99 (CAS 256386-07-9)
- Tedizolid Impurity 86 (CAS 2044712-34-5)
- 3-Methyl-2-quinoxalinone (CAS 14003-34-0)
- 2-(Quinolin-4-yl)-1-(4-(trifluoromethyl)phenyl)ethan-1-one (CAS 476472-22-7)
- 4-(Aminomethyl)bicyclo[2.2.1]heptane-1-carboxylic acid hydrochloride (CAS 28333-76-8)
- 1-(3,5-Dimethyl-1h-pyrazol-4-yl)ethan-1-amine dihydrochloride (CAS 1239479-62-9)
- 3-(Difluoromethyl)morpholine hydrochloride (CAS 2375261-03-1)
- 4H-1,2,4-triazole-3,4-diamine hydrochloride (CAS 6421-05-2)
- Semaglutide Impurity 128 (CAS 2490269-78-6)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com