Camptothecin Impurity 13 CAS 91421-42-0
| CAS No. | 91421-42-0 |
| Molecular Formula | C20H15N3O6 |
| Molecular Weight | 393.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Camptothecin Impurity 13 (CAS 91421-42-0), a certified reference material (molecular formula C20H15N3O6, MW 393.35 g/mol) for analytical method development and quality control.
The molecular framework of Camptothecin Impurity 13 (C20H15N3O6) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C20H15N3O6 |
| Molecular Weight | 393.35 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 3 |
Related Camptothecin Standards
- Camptothecin Impurity 11 (CAS 2569708-76-3)
- Camptothecin impurity 19 (CAS CATO-C4X-157119)
- Camptothecin impurity 18 (CAS 19685-11-1)
- Camptothecin Impurity 15 (CAS CATO-C4X-157115)
- Camptothecin Impurity 8 (CAS 86639-53-4)
- Camptothecin Impurity 12 (CAS 19685-10-0)
- 11-Ethyl Camptothecin (CAS 185807-29-8)
- Camptothecin Impurity 10 (CAS 68426-53-9)
Recommended Standards
- 4-[(4-Chlorophenyl)sulfanyl]-6-{[(4-chlorophenyl)sulfanyl]methyl}-2-methylpyrimidine (CAS 339278-78-3)
- N-(3,5-bis(trifluoromethyl)phenyl)-2-(p-tolylthio)acetamide (CAS 306732-37-6)
- 3-{[6-(5-formyl-2-methylphenoxy)-5-nitropyrimidin-4-yl]oxy}-4-methylbenzaldehyde (CAS 294848-93-4)
- Eltrombopag Impurity 108 (CAS CATO-C4X-1198108)
- 2-(diethylamino)ethyl 2-propenoate hydrochloride 5541-89-9 AR-1C8967 (CAS 5541-89-9)
- N-[1-(Methoxymethyl)-1H-1,2,4-triazol-5-yl]ethane-1,2-diamine oxalate (CAS 1630763-81-3)
- 1-(1-Ethyl-1h-1,3-benzodiazol-2-yl)ethan-1-amine dihydrochloride (CAS 1240528-74-8)
- 3-Amino-6-ethyl-5-methylthieno[2,3-b]pyridine-2-carboxamide (CAS 632291-80-6)
- 1-(6-(3,4-Dihydroquinolin-1(2H)-yl)-2-methylpyridin-3-yl)ethanol (CAS 1355200-56-4)
- 4'-(3,5-Bis(pyridin-4-ylethynyl)phenyl)-2,2':6',2''-terpyridine (CAS 1478039-72-3)
- N-((1-benzylpyrrolidin-3-yl)methyl)-2-chloro-N-methylacetamide (CAS 1353987-50-4)
- (E)-N'-(3-chloro-4-methoxybenzylidene)-4-methylbenzohydrazide (CAS 861207-78-5)
- methyl 5-bromo-1H-imidazole-4-carboxylate (CAS 1093261-46-1)
- Semaglutide impurity 29 (CAS 1188328-22-4)
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