Testosterone Impurity N13 CAS 6165-21-5
| CAS No. | 6165-21-5 |
| Molecular Formula | C19H32O2 |
| Molecular Weight | 292.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Testosterone Impurity N13 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies Testosterone Impurity N13 (CAS 6165-21-5), a pharmacopoeial impurity reference standard (molecular formula C19H32O2, MW 292.46 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Testosterone Impurity N13 (C19H32O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 292.46 g/mol, it falls into the medium-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C19H32O2 |
| Molecular Weight | 292.46 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Testosterone Standards
- Testosterone-d4 (CAS 638163-36-7)
- Testosterone-2,2,4,6,6-d5 (CAS 21002-80-2)
- 17-epi-Testosterone-d3 (CAS 171199-96-5)
- Testosterone-16,16,17-D3 (CAS 77546-39-5)
- Testosterone-13c3 (CAS 327048-83-9)
- Testosterone Impurity N12 (CAS 15183-38-7)
- Testosterone Impurity N11 (CAS 1963-03-7)
- Testosterone Impurity N14 (CAS 47122-33-8)
Recommended Standards
- 4-Ethyl-4'-(trans-4-ethylcyclohexyl)-1,1'-biphenyl (CAS 93393-40-9)
- 5-Tridecylresorcinol (CAS 5259-01-8)
- 3b,17b-Dihydroxy-5a-androstane (CAS 571-20-0)
- 5α-ANDROSTAN-3β, 16α-DIOL (CAS 22630-49-5)
- Ceftiofur Impurity 15 (CAS CATO-C4X-158115)
- Sertraline EP Impurity F Enantiomer (CAS 124379-29-9)
- Selumetinib Impurity 16 (CAS CATO-C4X-305316)
- (S)-6-Methoxychroman-3-carboxylic Acid (CAS 182570-28-1)
- 3-Cyclopropoxy-5-formylpicolinonitrile (CAS 1243471-86-4)
- N2,N4-Bis(3-(triethoxysilyl)propyl)-1,3,5-triazine-2,4,6-triamine (CAS CATO-CIM-105734)
- 3-Chloro-N-((S)-1-(1,3-dioxoisoindolin-2-yl)-3-(4-(8-((S)-1-hydroxyethyl)imidazo[1,2-a]pyridin-2-yl)phenyl)propan-2-yl)-4-isopropoxybenzamide (CAS 1240137-67-0)
- 5-(Hydroxymethyl)benzo[b]thiophene 1,1-dioxide (CAS 1613380-12-3)
- (Z,Z,Z)-17-Bromo-3,6,9-Heptadecatriene (CAS 156559-07-8)
- (Tyr?)-C-Type Natriuretic Peptide (32-53) (human, porcine, rat) (CAS 142878-79-3)
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