MEthyl 5-(4-bromophenyl)-1-(4-ethylphenyl)-2-methyl-1h-pyrrole-3-carboxylate CAS 881040-08-0
| CAS No. | 881040-08-0 |
| Molecular Formula | C21H20BrNO2 |
| Molecular Weight | 398.29 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 MEthyl 5-(4-bromophenyl)-1-(4-ethylphenyl)-2-methyl-1h-pyrrole-3-carboxylate (CAS 881040-08-0), a certified reference material (molecular formula C21H20BrNO2, MW 398.29 g/mol) for analytical method development and quality control.
Based on its molecular formula C21H20BrNO2, MEthyl 5-(4-bromophenyl)-1-(4-ethylphenyl)-2-methyl-1h-pyrrole-3-carboxylate contains a steroid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 398.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C21H20BrNO2 |
| Molecular Weight | 398.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related MEthyl Standards
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- 2-(3-Bromophenyl)-9-phenylcarbazole (CAS 1365118-41-7)
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Recommended Standards
- Methyl 5-(4-bromophenyl)-1-(2-ethylphenyl)-2-methyl-1H-pyrrole-3-carboxylate (CAS 881040-07-9)
- Baricitinib Impurity 127 (CAS CATO-C4X-2260127)
- Methyl 1-(4-bromophenyl)-5-(3,4-dimethylphenyl)-2-methyl-1H-pyrrole-3-carboxylate (CAS 881041-39-0)
- 2-(1-((5-Bromothiophen-2-yl)sulfonyl)azetidin-3-yl)-1H-benzo[d]imidazole (CAS 1251682-13-9)
- (2E)-1-(3-Chlorophenyl)-3-(3-methylphenyl)prop-2-en-1-one (CAS 52182-38-4)
- 1-PiperidinepropanalDISCONTINUED (CAS 99969-65-0)
- 1-Ethyl-1H-imidazo[4,5-b]pyridine (CAS 273756-99-3)
- 5-fluoro-1,3-benzothiazole-2-carboxylic acid (CAS 139425-47-1)
- Ethyl 5-bromo-1H-pyrrolo[3,2-b]pyridine-2-carboxylate (CAS 1255098-82-8)
- 3-Cyclopropoxy-5-nitrobenzoic acid (CAS 1243450-28-3)
- tert-Butyl 2-(2-cyanoacetyl)piperidine-1-carboxylate (CAS 887592-68-9)
- Pyrroloquinoline Impurity 3 (CAS 107575-59-7)
- 2-Amino-N-(2-fluorophenyl)-3-(4-nitrobenzoyl)indolizine-1-carboxamide (CAS 904267-35-2)
- Peptide Impurity 27 (CAS 1350456-68-6)
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