Naltrexone EP Impurity A CAS 1007856-83-8
| CAS No. | 1007856-83-8 |
| Molecular Formula | C17H17NO5 |
| Molecular Weight | 315.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Naltrexone EP Impurity A (CAS 1007856-83-8) is a certified pharmaceutical impurity reference standard with the molecular formula C17H17NO5 and a molecular weight of 315.32 g/mol.
Structurally, Naltrexone EP Impurity A (C17H17NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 315.32 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C17H17NO5 |
| Molecular Weight | 315.32 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Nitrogen Atoms | 1 |
Related Naltrexone Standards
- Naltrexone Impurity 22 (CAS CATO-C4X-147522)
- Naltrexone Impurity 64 (CAS CATO-C4X-147564)
- Naltrexone Impurity 27 (CAS CATO-C4X-147527)
- Naltrexone impurity 34 (CAS CATO-C4X-147534)
- Naltrexone impurity 60 (CAS CATO-C4X-147560)
- Naltrexone Impurity 11 (CAS 123086-68-0)
- Naltrexone Impurity 20 (CAS CATO-C4X-147520)
- Naltrexone Impurity 26 (CAS CATO-C4X-147526)
Recommended Standards
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- 7,7'-Dibromo-5,5'-dinitro-4,4'-bibenzo[c][1,2,5]thiadiazole (CAS 1418269-35-8)
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- Semaglutide impurity 103 (CAS 1446013-07-5)
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