Erythromycin Impurity 41 CAS 33275-72-8
| CAS No. | 33275-72-8 |
| Molecular Formula | C37H65NO11 |
| Molecular Weight | 699.91 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Erythromycin Impurity 41 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.
As a process- or degradation-related impurity, Erythromycin Impurity 41 (CAS 33275-72-8, C37H65NO11) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Erythromycin Impurity 41 (C37H65NO11) is characterized by a nitrogen-containing heterocyclic scaffold, 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C37H65NO11 |
| Molecular Weight | 699.91 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
Related Erythromycin Standards
- Erythromycin Impurity 40 (CAS CATO-C4X-100140)
- Erythromycin impurity 56 (CAS CATO-C4X-100156)
- Erythromycin EP Impurity K (CAS 33442-56-7)
- Erythromycin Impurity 49 (CAS 229318-98-3)
- Erythromycin B rearranged derivatives (CAS CATO-C4X-100170)
- Erythromycin EP Impurity E (CAS 33396-29-1)
- Erythromycin EP Impurity D (CAS 23893-13-2)
- Erythromycin EP Impurity F (CAS 105882-69-7)
Recommended Standards
- 6,6',6''-(1,3,5-Triazine-2,4,6-triyl)tris(3-(hexyloxy)-2-methylphenol) (CAS 222529-65-9)
- 3,6-Di([1,1':3',1''-terphenyl]-5'-yl)-9-phenyl-9H-carbazole (CAS 1201649-79-7)
- Tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate (CAS 40601-76-1)
- (Z)-2-[2-(Tritylamino)thiazol-4-yl]-2-(trityloxyimino)acetic Acid Ethyl Ester (CAS 69689-86-7)
- Cefathiamidine Impurity 16 (CAS 58197-02-7)
- Neostigmine impurity 37 (CAS CATO-C4X-204237)
- Edoxaban Impurity 108 (CAS CATO-C4X-1063108)
- 4-(2-Methoxyphenyl)-1H-pyrrole-3-carbonitrile (CAS 87388-19-0)
- Benidipine Impurity 66 (CAS CATO-C4X-112066)
- 4-Amino-N-(2-methoxy-5-methylphenyl)benzenesulfonamide (CAS 860241-91-4)
- 2-(2,6,6-Trimethyl-4-oxo-4,5,6,7-tetrahydrobenzofuran-3-yl)acetic acid (CAS 97024-74-3)
- 4-Aminoquinoline-6-carboxylic acid (CAS 73873-91-3)
- (4-Bromo-3-methoxyphenyl)hydrazine hydrochloride (CAS 262851-33-2)
- C-telopeptide (CAS 162929-64-8)
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