Ethyl 6-bromo-5-methoxy-2-methyl-1-(p-tolyl)-1H-indole-3-carboxylate CAS 939357-55-8
| CAS No. | 939357-55-8 |
| Molecular Formula | C20H20BrNO3 |
| Molecular Weight | 402.28 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.
CATO supplies Ethyl 6-bromo-5-methoxy-2-methyl-1-(p-tolyl)-1H-indole-3-carboxylate (CAS 939357-55-8), a certified reference material (molecular formula C20H20BrNO3, MW 402.28 g/mol) for analytical method development and quality control.
Ethyl 6-bromo-5-methoxy-2-methyl-1-(p-tolyl)-1H-indole-3-carboxylate (C20H20BrNO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C20H20BrNO3 |
| Molecular Weight | 402.28 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
- 3,3-Dimethyl 4,6-dioxo-5-[3-(trifluoromethyl)phenyl]-hexahydro-2H-pyrrolo[3,4-d][1,2]oxazole-3,3-dicarboxylate (CAS 338420-24-9)
- N-{4-[(4-bromophenyl)sulfanyl]phenyl}-4-fluorobenzamide (CAS 339104-54-0)
- 2,7-Di(2H-tetrazol-5-yl)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone (CAS 429693-19-6)
- Tert-butyl 4-(benzyloxy)-3-bromo-1H-indole-1-carboxylate (CAS 914349-26-1)
- 7-Fluoroquinoline-4-carboxylic acid (CAS 31009-03-7)
- N-(2-Chloroethyl)-4-methoxybenzamide (CAS 15257-92-8)
- n-(2-(Pyridin-2-yl)ethyl)pentan-2-amine (CAS 1019592-68-7)
- Pcb No. 104 (CAS 56558-16-8)
- 1-(4-(p-Tolyl)piperidin-4-yl)ethanone (CAS 802281-31-8)
- (E)-3-(Dimethylamino)-1-(pyrazin-2-yl)prop-2-en-1-one (CAS 866000-17-1)
- 3-chloro-5-(furan-3-yl)-1,2,4-oxadiazole (CAS 1443980-20-8)
- 2-Isopropyl-5-methyl-1H-imidazole (CAS 37455-58-6)
- 5-(4-Bromophenyl)-3-phenylisoxazole (CAS 53573-22-1)
- Tirzepatide Impurity 52 (CAS CATO-C4X-324052)
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