18:0 Dibromo MG CAS 1438282-43-9
| CAS No. | 1438282-43-9 |
| Molecular Formula | C21H40Br2O4 |
| Molecular Weight | 516.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
18:0 Dibromo MG (CAS 1438282-43-9), molecular formula C21H40Br2O4 and molecular weight 516.35 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 18:0 Dibromo MG (C21H40Br2O4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C21H40Br2O4 |
| Molecular Weight | 516.35 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Br-containing |
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Recommended Standards
- 2,3,4,5,6-Pentafluorophenyl 1-methyl-4-({[3-(trifluoromethyl)phenyl]methyl}amino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylate (CAS 866136-99-4)
- N'-{1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]piperidin-4-ylidene}-1-(6-chloropyridazin-3-yl)piperidine-4-carbohydrazide (CAS 338413-83-5)
- Aripiprazole Impurity 31 (CAS 2748381-51-1)
- CAS 2260670-18-4 (CAS 2260670-18-4)
- (2Z)-2-(4-Fluorobenzylidene)-6-hydroxy-7-methyl-1-benzofuran-3(2H)-one (CAS 1092298-07-1)
- 2-(4-Bromo-1H-pyrazol-1-yl)cyclobutan-1-one (CAS 2432829-50-8)
- n-Cyclopropyl-4-(phenylthio)butanamide (CAS 1197782-25-4)
- {3-[3-(3-fluorophenyl)-1H-pyrazol-5-yl]propyl}(methyl)amine (CAS 1232136-36-5)
- (2,4-Dichlorophenyl)(4-fluorophenyl)methanone (CAS 65214-59-7)
- 5-Bromo-2-methyl-[1,3]oxazolo[4,5-b]pyridine (CAS 1196155-00-6)
- 6-Fluoro-2,3,4,5-tetrahydro-1h-pyrido[4,3-b]indole (CAS 177858-77-4)
- 4-Ethoxy-3-ethynylbenzoic acid (CAS 2365228-84-6)
- 4-Bromo-2-(difluoromethyl)pyridine (CAS 1211580-54-9)
- Peptide Impurity 82 (CAS 10491-78-8)
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