Minocycline impurity 73 CAS 156263-28-4
| CAS No. | 156263-28-4 |
| Molecular Formula | C25H29ClN4O8 |
| Molecular Weight | 548.97 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Minocycline impurity 73 (CAS 156263-28-4) is a certified pharmaceutical impurity reference standard with the molecular formula C25H29ClN4O8 and a molecular weight of 548.97 g/mol.
Structurally, Minocycline impurity 73 (C25H29ClN4O8) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 548.97 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), Minocycline impurity 73 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 | C25H29ClN4O8 |
| Molecular Weight | 548.97 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Minocycline Standards
- Minocycline Impurity 67 (CAS CATO-C4X-169967)
- Minocycline Impurity 71 (CAS CATO-C4X-169971)
- Minocycline Impurity 64 (CAS CATO-C4X-169964)
- Minocycline Impurity 43 (CAS 28698-94-4)
- Minocycline Impurity 26 (CAS 149934-16-7)
- Minocycline EP Impurity G (CAS 601455-95-2)
- Minocycline Dehydro Impurity (CAS CATO-C4X-16995)
- Minocycline Impurity 54 (CAS CATO-C4X-169954)
Recommended Standards
- Dapagliflozin Impurity 41 (CAS 1079083-63-8)
- Tigecycline Impurity 34 (CAS CATO-C4X-186034)
- N-(benzo[d][1,3]dioxol-5-ylmethyl)-4-(1-(2-((3-chlorophenyl)amino)-2-oxoethyl)-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl)butanamide (CAS 899937-47-4)
- Didodecyldi-m-tolylsilane (CAS 18856-18-3)
- Enzalutamide Impurity 39 (CAS CATO-C4X-101639)
- Nitroso Perindopril EP impurity S (CAS CATO-C4X-125256)
- Isavuconazole Impurity 31 (CAS 20099-89-2)
- 1-(P-tolyl)-1H-imidazole-4-carboxylic acid (CAS 14048-60-3)
- 1-N-Boc-5-bromo-3-trifluoromethyl-1H-indazole (CAS 929617-37-8)
- methyl 4-fluoro-5-methylfuran-3-carboxylate (CAS 2117692-62-1)
- (2-Carboxyethyl)ferrocene (CAS 12261-46-0)
- 2-{[4-(3-bromothiophen-2-yl)-1,3-thiazol-2-yl]methyl}-1,3-thiazol-4-ol (CAS 860785-66-6)
- 3-Oxo-2-phenyl-piperidine-1-carboxylic acid tert-butyl ester (CAS 148701-78-4)
- (Glu9)-Exenatide (2-39) trifluoroacetate salt (CAS 196109-34-9)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com