11-Ethyl Camptothecin CAS 185807-29-8
| CAS No. | 185807-29-8 |
| Molecular Formula | C22H20N2O4 |
| Molecular Weight | 376.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
11-Ethyl Camptothecin (C22H20N2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
11-Ethyl Camptothecin (CAS 185807-29-8), molecular formula C22H20N2O4 and molecular weight 376.41 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C22H20N2O4 |
| Molecular Weight | 376.41 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2010 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- Camptothecin Impurity 12 (CAS 19685-10-0)
- Camptothecin impurity 19 (CAS CATO-C4X-157119)
- Camptothecin Impurity 10 (CAS 68426-53-9)
- Camptothecin impurity 17 (CAS 86639-48-7)
- Camptothecin Impurity 9 (CAS 67656-30-8)
- 7-Methyl Camptothecin (CAS 78287-26-0)
- Camptothecin Impurity 13 (CAS 91421-42-0)
- Camptothecin Impurity 11 (CAS 2569708-76-3)
Recommended Standards
- 2-((S)-1-(2-((S)-2-Amino-3-phenylpropanamido)acetyl)pyrrolidine-2-carboxamido)acetic acid (CAS 165745-00-6)
- (E)-Benzyl({3-methoxy-4-[(4-nitrophenyl)methoxy]phenyl}methylidene)amine (CAS 328263-30-5)
- (S)-11-((tert-butoxycarbonyl)amino)-6-imino-2,2-dimethyl-4-oxo-3,8-dioxa-5,7-diazadodecan-12-oic acid (CAS 165105-47-5)
- (R)-1-((R)-4-Amino-2-((R)-2-amino-3-phenylpropanamido)-4-oxobutanoyl)pyrrolidine-2-carboxylic acid (CAS 821776-16-3)
- 1-(2-((1-Methyl-1H-tetrazol-5-yl)thio)acetyl)-N-(thiazol-2-yl)piperidine-4-carboxamide (CAS 1226437-38-2)
- 4,5-Difluoro-2-(methyl)thiophenol (CAS 1806289-18-8)
- Prop-2-yn-1-yl 3-chloro-5-ethoxy-4-((4-fluorobenzyl)oxy)benzoate (CAS 1706446-04-9)
- Pregabalin Impurity 132 (CAS CATO-C4X-1312132)
- tert-Butyl 3-hydroxy-2,2-dimethyl-5-oxo-2,5-dihydro-1H-pyrrole-1-carboxylate (CAS 1352723-60-4)
- 6-Ethynylpyridin-3-ol (CAS 1346539-11-4)
- Methyl (R)-3-amino-3-(3,4-dichlorophenyl)propanoate (CAS 1212868-99-9)
- 7-Bromo-6,8-dimethylpyrido[2,3-b]pyrazine (CAS 116056-18-9)
- 5-Iodo-2-methyl-3-nitropyridine (CAS 905439-49-8)
- Bonemarrow-Derived Mesenchymal Stem Cells Affinity Peptide trifluoroacetate salt (CAS 683750-83-6)
Why CATO?
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