Testosterone Impurity 17 CAS 14043-47-1
| CAS No. | 14043-47-1 |
| Molecular Formula | C19H28O2 |
| Molecular Weight | 288.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Testosterone Impurity 17 is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Testosterone Impurity 17 (CAS 14043-47-1) is a certified pharmaceutical impurity reference standard with the molecular formula C19H28O2 and a molecular weight of 288.42 g/mol.
Testosterone Impurity 17 (C19H28O2) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
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 | C19H28O2 |
| Molecular Weight | 288.42 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
Related Testosterone Standards
- Testosterone Impurity 8 (Androstane-3,17-Dione) (Mixture of Diastereomers) (CAS 5982-99-0)
- Testosterone Impurity 15 (CAS 1311972-85-6)
- Testosterone Impurity 16 (CAS CATO-C4X-132616)
- Testosterone Impurity 67 (CAS 330433-79-9)
- Testosterone (CAS 58-22-0)
- 1-Testosterone (CAS 65-06-5)
- Testosterone Impurity N11 (CAS 3275-64-7)
- Testosterone Impurity N35 (CAS 27833-18-7)
Recommended Standards
- Levonorgestrel EP Impurity K (CAS 793-55-5)
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- Rocuronium Impurity 48 (CAS CATO-C4X-124248)
- Prasterone Impurity 17 (CAS CATO-C4X-19217)
- Epinastine Impurity 18 (CAS CATO-C4X-184018)
- Rocuronium Impurity 28 (CAS CATO-C4X-124228)
- Nikethamide Impurity 8 (CAS 530-40-5)
- 1-tert-Butyl-1H-pyrrole (CAS 24764-40-7)
- Empagliflozin Impurity 44 (CAS CATO-C4X-106544)
- 3-Bromo-4-iodo-5-methylpyridine (CAS 1805150-54-2)
- 1-(3-(((2-Aminoethyl)(ethyl)amino)methyl)pyrrolidin-1-yl)ethanone (CAS 1353967-31-3)
- N-[(3-Oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)sulfonyl]glycine (CAS 874801-32-8)
- Oleic Anhydride (CAS 24909-72-6)
- Palmitoyl hexapeptide-6 (CAS 891498-01-4)
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