Papaverine Impurity 17 CAS 18783-43-2
| CAS No. | 18783-43-2 |
| Molecular Formula | C19H19NO4 |
| Molecular Weight | 325.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 325.36 g/mol gives Papaverine Impurity 17 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Papaverine Impurity 17 (CAS 18783-43-2), a pharmacopoeial impurity reference standard (molecular formula C19H19NO4, MW 325.36 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Papaverine Impurity 17 (C19H19NO4) contains a flavonoid core, an amide group, 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 325.36 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C19H19NO4 |
| Molecular Weight | 325.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1962 |
| Nitrogen Atoms | 1 |
Related Papaverine Standards
- Papaverine Impurity 2 (CAS 18813-60-0)
- Papaverine Impurity 27 (CAS 855737-36-9)
- Papaverine Impurity 38 (CAS 726117-59-5)
- Papaverine Impurity 37 (CAS 1207386-32-0)
- Papaverine Impurity 28 (CAS 20122-48-9)
- Papaverine (CAS 58-74-2)
- Papaverine Impurity 15 (CAS 57170-09-9)
- Papaverine Impurity 29 (CAS 23602-58-6)
Recommended Standards
- N-Nitroso Revefenacin Impurity 49 (CAS CATO-C4X-203149)
- Finerenone Impurity 85 (CAS CATO-C4X-288085)
- N-Nitroso Revefenacin impurity 100 (CAS CATO-C4X-2031100)
- Famciclovir-d4 (CAS 1020719-42-9)
- N-Nitroso Dequalinium impurity 36 (CAS CATO-C4X-193636)
- Enzalutamide Impurity 29 (CAS CATO-C4X-101629)
- Solriamfetol Impurity 4 (CAS CATO-C4X-25634)
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- 3-(3-Phenylpropyl)-2-sulfanyl-3,4-dihydroquinazolin-4-one (CAS 775300-73-7)
- Cycloaspeptide D (CAS 691363-62-9)
Why CATO?
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