Testosterone Impurity 37 CAS CATO-C4X-243237
| CAS No. | CATO-C4X-243237 |
| Molecular Formula | C41H70O4 |
| Molecular Weight | 626.99 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Testosterone Impurity 37 is typically off-white to pale yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 626.99 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
As a process- or degradation-related impurity, Testosterone Impurity 37 (CAS CATO-C4X-243237, C41H70O4) 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 | C41H70O4 |
| Molecular Weight | 626.99 g/mol |
| Purity | 95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Testosterone Standards
- Testosterone Impurity 43 (CAS CATO-C4X-243243)
- Testosterone palmitate (CAS 991-20-8)
- Testosterone Impurity 30 (CAS CATO-C4X-132630)
- Testosterone Impurity 31 (CAS CATO-C4X-132631)
- Testosterone Impurity 32 (CAS CATO-C4X-132632)
- Testosterone Impurity N9 (CAS 162890-98-4)
- Testosterone Impurity 27 (CAS CATO-C4X-132627)
- Testosterone Impurity 28 (CAS CATO-C4X-132628)
Recommended Standards
- Clindamycin Phosphas Impurity 41 (CAS CATO-C4X-134141)
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- Zinc antimonide (CAS 12039-42-8)
- N1,N1-Dibutyl-N4,N4-bis(4-(dibutylamino)phenyl)benzene-1,4-diamine (CAS 47862-55-5)
- Domperidone Impurity 39 (CAS 34840-27-2)
- Cyproterone Acetate EP Impurity B (CAS CATO-C4X-16013)
- Mirogabalin Impurity 19 (CAS CATO-C4X-292419)
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- 2,4-Dichlorophenethyl alcohol (CAS 81156-68-5)
- 2-(Propan-2-yl)-4-(trifluoromethyl)furan-3-carboxylic acid (CAS 2091455-01-3)
- Bicalutamide Impurity 14 (Bicalutamide Epoxide Impurity) (CAS 90357-51-0)
- 2-((5,6-Diphenyl-1,2,4-triazin-3-yl)thio)-N,N-diethylacetamide (CAS 332393-80-3)
- 1-Methyl-3-(methylcarbamoyl)-1H-pyrazole-5-carboxylic acid (CAS 1353631-67-0)
- C-Type Natriuretic Peptide (32-53) (human, porcine, rat) (CAS 127869-51-6)
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