Dapoxetine Impurity 20 CAS 156453-50-8
| CAS No. | 156453-50-8 |
| Molecular Formula | C19H18O2 |
| Molecular Weight | 278.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Dapoxetine Impurity 20 (CAS 156453-50-8), a pharmacopoeial impurity reference standard (molecular formula C19H18O2, MW 278.35 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Dapoxetine Impurity 20 (C19H18O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 278.35 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).
As a certified reference material (CRM), Dapoxetine Impurity 20 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.
Physical & Chemical Properties
| Molecular Formula | C19H18O2 |
| Molecular Weight | 278.35 g/mol |
| Appearance | Pale yellow to 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
Related Dapoxetine Standards
- Dapoxetine Impurity 10 (CAS 908291-72-5)
- Dapoxetine Impurity 19 (CAS 156453-53-1)
- Dapoxetine Impurity 89 (CAS CATO-C4X-143989)
- Dapoxetine Impurity 4 (CAS 119357-34-5)
- Dapoxetine Impurity 5 (CAS 1329834-62-9)
- Dapoxetine Impurity 6 (CAS 147199-40-4)
- Dapoxetine Impurity 17 (CAS 41198-42-9)
- Dapoxetine Impurity 57 (CAS 126113-24-4)
Recommended Standards
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- Tramadol Impurity 21 (CAS CATO-C4X-149821)
- Avibactam Impurity 9 (CAS 2085372-13-8)
- Brexpiprazole Impurity 20 (CAS 616227-75-9)
- Lenvatinib Impurity 180 (CAS CATO-C4X-1140180)
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- 5,6-Dichloro-1-methyl-1,3-dihydro-2H-benzo[d]imidazol-2-one (CAS 1332624-58-4)
- 3-(Aminomethyl)-5-cyclopropoxy-N-methylaniline (CAS 1243348-66-4)
- (5E)-3-(2-Aminoethyl)-5-[(4-chlorophenyl)methylidene]-1,3-thiazolidine-2,4-dione hydrochloride (CAS 478792-13-1)
- Venetoclax Impurity 136 (CAS CATO-C4X-2495136)
- 2-Amino-6-(tert-butyl)-N-cyclopropyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxamide (CAS 590352-38-8)
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Why CATO?
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