2-Ethyl-5-methoxy-3-(4-methoxyphenyl)-1H-indole CAS 91444-15-4
| CAS No. | 91444-15-4 |
| Molecular Formula | C18H19NO2 |
| Molecular Weight | 281.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Ethyl-5-methoxy-3-(4-methoxyphenyl)-1H-indole (CAS 91444-15-4), molecular formula C18H19NO2 and molecular weight 281.35 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Ethyl-5-methoxy-3-(4-methoxyphenyl)-1H-indole (C18H19NO2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 281.35 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), 2-Ethyl-5-methoxy-3-(4-methoxyphenyl)-1H-indole 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 | C18H19NO2 |
| Molecular Weight | 281.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 1 |
Related Ethyl Standards
- 2-(5-Methoxy-3H-indol-3-yl)-N-(pyridin-3-ylmethyl)ethan-1-amine (CAS 1089343-45-2)
- 1-Benzyl-4-(2-methoxy-phenyl)-1,2,3,6-tetrahydro-pyridine (CAS 113411-59-9)
- (S)-5-Methoxy-N-((R)-1-phenylethyl)-1,2,3,4-tetrahydronaphthalen-2-amine (CAS 1403690-99-2)
- N-(2-Methoxy-2-(5-methylthiophen-2-yl)ethyl)thiophene-3-carboxamide (CAS 1448058-41-0)
- 1-Benzyl-4-methoxy-1h-indole-2-carboxylic acid (CAS 1048660-06-5)
- 2-(2-Methoxy-5-methylphenyl)-1H-indole-3-carboxylic acid (CAS 1082289-73-3)
- 2-(4-Methoxy-3-methylphenyl)-1H-indole-3-carboxylic acid (CAS 1082467-46-6)
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Recommended Standards
- 2-Butyl-4-ethoxy-5-morpholinopyridazin-3(2H)-one (CAS 51659-93-9)
- 3-(1-(2,3-Dihydro-1h-inden-5-yl)-2,5-dimethyl-1h-pyrrol-3-yl)acrylic acid (CAS 924876-46-0)
- 2-Azetidinomethyl-3-methoxybenzophenone (CAS 898754-38-6)
- 3-(5,6-Dimethyl-1-propyl-1H-benzo[d]imidazol-2-yl)pyridin-2(1H)-one (CAS 860787-77-5)
- Mexiletine-d3 HCl (CAS CATO-C4X-19295)
- DA-67 (CAS 115871-18-6)
- (S)-5-Methoxy-N,N-dipropyl-1,2,3,4-tetrahydronaphthalen-2-amine (CAS 136655-20-4)
- 1-Cyclopentyl-3-methyl-1h-pyrazol-4-amine (CAS 1006495-58-4)
- Ethyl 6-oxo-3,6-dihydropyrimidine-4-carboxylate (CAS 223788-14-5)
- Bis(4-ethynylphenyl)methane (CAS 6140-83-6)
- 2-(3-Hydroxypropyl)-4,5-dimethoxyphenol (CAS 115546-31-1)
- 3,4-Dibromotoluene (CAS 60956-23-2)
- 2-Amino-3-(5-chloro-2-(trifluoromethyl)phenyl)propanoic acid (CAS 1256482-62-8)
- endo-Arg30-Semaglutide (CAS CATO-C4X-2226281)
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