Milbemycin Oxime EP Impurity I CAS CATO-C4X-169811
| CAS No. | CATO-C4X-169811 |
| Molecular Formula | C32H44O8 |
| Molecular Weight | 556.69 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Milbemycin Oxime EP Impurity I 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.
CATO supplies Milbemycin Oxime EP Impurity I (CAS CATO-C4X-169811), a pharmacopoeial impurity reference standard (molecular formula C32H44O8, MW 556.69 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C32H44O8, Milbemycin Oxime EP Impurity I contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 556.69 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C32H44O8 |
| Molecular Weight | 556.69 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 |
Related Milbemycin Standards
- Milbemycin D (CAS 77855-81-3)
- Milbemycin A4 Oxime (CAS 93074-04-5)
- Milbemycin Oxime EP Impurity G (CAS 93074-02-3)
- 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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- N-(Boc-PEG3)-N-bis(PEG2-alcohol) (CAS 2055042-60-7)
- Boc-Tyr(tBu)-Tyr(tBu)-OH (CAS CATO-CPTD788752)
- Nicotine Impurity 20 DiHCl (CAS 66093-90-1)
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- Landiolol Impurity 76 (CAS CATO-C4X-262176)
- 2-(2-Methyl-1h-indol-3-yl)-2-oxoacetic acid (CAS 62454-47-1)
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- (S)-7-Chloro-2,3-dihydrobenzofuran-3-amine (CAS 1228550-53-5)
- 3-(2,3-Dimethylphenyl)-2-methyl-1-propene (CAS 951891-60-4)
- tert-Butyl 8-azabicyclo[3.2.1]octan-2-ylcarbamate (CAS 1419101-51-1)
- tert-butyl N-[2-(aminooxy)ethyl]carbamate (CAS 75051-55-7)
- Semaglutide Impurity 184 (CAS CATO-C4X-2226184)
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