Dihydro Ergotamine Impurity 8 CAS 91653-37-1
| CAS No. | 91653-37-1 |
| Molecular Formula | C33H37N5O5 |
| Molecular Weight | 583.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Dihydro Ergotamine Impurity 8 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.
Dihydro Ergotamine Impurity 8 (CAS 91653-37-1), molecular formula C33H37N5O5 and molecular weight 583.68 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C33H37N5O5, Dihydro Ergotamine Impurity 8 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 583.68 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C33H37N5O5 |
| Molecular Weight | 583.68 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 5 |
Related Dihydro Standards
- Dihydro Ergotamine Impurity 4 (CAS 511-12-6)
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Recommended Standards
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- Abrocitinib Impurity 47 (CAS CATO-C4X-288447)
- Insulin Degludec Impurity 18 (CAS CATO-C4X-215718)
- 6-Fluoro-4-oxo-7-(trifluoromethyl)-1,4-dihydroquinoline-3-carboxylic acid (CAS 26893-19-6)
- 4-(Difluoromethyl)-2-fluoro-3-iodo-5-methylpyridine (CAS 1805192-65-7)
- 4-(5-Methyl-4-phenyl-1H-pyrazol-3-yl)-4H-1,2,4-triazole (CAS 62537-94-4)
- Ethyl 8-benzoyl-6-chloro-4-oxo-1,4-dihydroquinoline-3-carboxylate (CAS 192513-59-0)
- 2-(Ethylamino)nicotinonitrile (CAS 52583-89-8)
- 1-[2-(4-methylpiperidin-1-yl)phenyl]methanamine,2HCl (CAS 1431964-89-4)
- 4-(4-Hydroxypiperidine-1-carbonyl)-5,6-dimethylpyridazin-3(2h)-one (CAS 1153438-14-2)
- 2-((1,2-Diphenylhydrazinyl)methyl)-4,6-dimethylpyridine (CAS 32812-38-7)
- Dl-alaninolhydrochloride (CAS 17016-92-1)
- Liraglutide Sodium Salt (CAS 204656-20-2（free base）)
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