Finasteride Impurity 9 CAS CATO-C4X-16459
| CAS No. | CATO-C4X-16459 |
| Molecular Formula | C23H38N2O3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Finasteride Impurity 9 is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Finasteride Impurity 9 (CAS CATO-C4X-16459) is a certified pharmaceutical impurity reference standard with the molecular formula C23H38N2O3HCl and a molecular weight of 427.03 g/mol.
The molecular framework of Finasteride Impurity 9 (C23H38N2O3HCl) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C23H38N2O3 HCl |
| Molecular Weight | 427.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Finasteride Standards
- Finasteride Impurity N50 (CAS 10325-79-8)
- Finasteride EP Impurity B (CAS 103335-41-7)
- Finasteride Impurity 3-one-4-aza-5-androstene-17β-carboxylate methyl ester (CAS 104214-18-8)
- Finasteride Impurity 43 (CAS 104214-61-1)
- Finasteride-d9 (CAS 1131342-85-2)
- Finasteride Carboxylic Acid (CAS 116285-37-1)
- Finasteride Impurity 42 (CAS 116285-38-2)
- Finasteride Impurity 16 (CAS 116285-41-7)
Recommended Standards
- Probucol Impurity 6 (CAS CATO-C4X-29206)
- Ampicillin Impurity 37 (CAS CATO-C4X-144337)
- Isavuconazole Impurity 197 (CAS CATO-C4X-1236197)
- N-(2-Chlorophenyl)-3-hydroxy-2-naphthalenecarboxamide (CAS 6704-40-1)
- 3′-O-[(1,1-Dimethylethyl)dimethylsilyl]-2′-O-methyluridine (CAS 171268-84-1)
- (R)-1-(4-methoxy-3-methylphenyl)but-3-en-1-amine (CAS 1334872-56-8)
- Atrasentan Impurity 47 (CAS 1059052-54-8)
- Bis(2-aminoethyl)[2-(morpholin-4-yl)ethyl]amine (CAS 1339836-45-1)
- hept-5-ynoic acid (CAS 255381-83-0)
- Tau Peptide (337-368) (Repeat 4 Domain) trifluoroacetate salt (CAS 330456-27-4)
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