Milbemycin Oxime EP Impurity G CAS 93074-02-3
| CAS No. | 93074-02-3 |
| Molecular Formula | C33H47NO7 |
| Molecular Weight | 569.73 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C33H47NO7, Milbemycin Oxime EP Impurity G 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 569.73 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).
CATO supplies Milbemycin Oxime EP Impurity G (CAS 93074-02-3), a pharmacopoeial impurity reference standard (molecular formula C33H47NO7, MW 569.73 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), Milbemycin Oxime EP Impurity G 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.
Physical & Chemical Properties
| Molecular Formula | C33H47NO7 |
| Molecular Weight | 569.73 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 1 |
Related Milbemycin Standards
- Milbemycin D (CAS 77855-81-3)
- Milbemycin Oxime EP Impurity I (CAS CATO-C4X-169811)
- Milbemycin A4 Oxime (CAS 93074-04-5)
- Milbemycin Impurity 5 (CAS 51596-12-4)
- Milbemycin Oxime EP Impurity A (CAS 51596-11-3)
- Milbemycin Oxime EP Impurity H (CAS 1025877-03-5)
- Milbemycin A3 Oxime (CAS 114177-14-9)
- Milbemycin Oxime EP Impurity E (CAS 86691-97-6)
Recommended Standards
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- 2-[4-(Trifluoromethyl)phenyl]thiazole-5-carboxylic Acid (CAS 762287-51-4)
- N-(3-chlorobenzyl)-2-nitrobenzenesulfonamide (CAS 866151-88-4)
- 1-(Chloromethyl)-3-methylnaphthalene (CAS 362707-39-9)
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- 3-Methyl-6-(methylamino)pyrimidine-4(3H)-thione (CAS 1195-41-1)
- Methyl 1-hydroxy-1h-1,2,3-benzotriazole-6-carboxylate (CAS 743452-21-3)
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