Milbemycin CAS 51570-36-6
| CAS No. | 51570-36-6 |
| Molecular Formula | C31H44O7 |
| Molecular Weight | 528.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Milbemycin is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Milbemycin (CAS 51570-36-6), molecular formula C31H44O7 and molecular weight 528.68 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C31H44O7, Milbemycin 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 528.68 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 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 | C31H44O7 |
| Molecular Weight | 528.68 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
Related Milbemycin Standards
- Milbemycin Oxime EP Impurity F (CAS 86691-98-7)
- Milbemycin Oxime EP Impurity E (CAS 86691-97-6)
- Milbemycin Oxime EP Impurity H (CAS 1025877-03-5)
- Milbemycin A3 Oxime (CAS 114177-14-9)
- Milbemycin Impurity 5 (CAS 51596-12-4)
- Milbemycin Oxime EP Impurity A (CAS 51596-11-3)
- Milbemycin A4 Oxime (CAS 93074-04-5)
- Milbemycin Oxime EP Impurity I (CAS CATO-C4X-169811)
Recommended Standards
- 4',6''-Bis((S)-4-isopropyl-4,5-dihydrooxazol-2-yl)-1,1':3',1'':3'',1'''-quaterphenyl (CAS 890933-57-0)
- Milbemectin A3 (CAS 51596-10-2)
- Cyclopentynafil (CAS 1173706-34-7)
- Mupirocin Impurity 13 (CAS 167842-57-1)
- 2-methyl-N-[(Z)-(oxan-4-yl)methylidene]propane-2-sulfinamide (CAS 2760521-60-4)
- Duloxetine Impurity 6 (CAS 132335-46-7)
- N-(2,3-Difluorobenzyl)-1-(1-propyl-1H-pyrazol-4-yl)methanamine hydrochloride (CAS 1856091-69-4)
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- 1-(Propylsulfonyl)-1,2,3,4-tetrahydroquinolin-6-amine (CAS 927996-21-2)
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- 6-methylimidazo[1,2-a]pyridine-8-carboxylic acid (CAS 1427082-16-3)
- Tirzepatide Impurity 59 (CAS CATO-C4X-324059)
Why CATO?
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