3-[1-(2,3-dimethoxyphenyl)-2-nitroethyl]-1h-indole CAS 33723-32-9
| CAS No. | 33723-32-9 |
| Molecular Formula | C18H18N2O4 |
| Molecular Weight | 326.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-[1-(2,3-dimethoxyphenyl)-2-nitroethyl]-1h-indole (CAS 33723-32-9), molecular formula C18H18N2O4 and molecular weight 326.35 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-[1-(2,3-dimethoxyphenyl)-2-nitroethyl]-1h-indole (C18H18N2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 326.35 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C18H18N2O4 |
| Molecular Weight | 326.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 2 |
Related dimethoxyphenyl Standards
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- 3-(2,4-Dimethoxyphenyl)-7-methoxy-4-methyl-2H-chromen-2-one (CAS 554430-78-3)
- 3-(3’,4’-Dimethoxyphenyl)-6-methoxy-4-methylcoumarin (CAS 720674-34-0)
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Recommended Standards
- 3,6-Bis(4-hydroxybenzyl)piperazine-2,5-dione (CAS 5625-40-1)
- 3-[4-(5-hydroxypent-1-ynyl)-1-oxo-isoindolin-2-yl]piperidine-2,6-dione (CAS 2138441-30-0)
- 3,3-Dimethyl-1-{3-[(4-nitrophenyl)methoxy]phenyl}azetidin-2-one (CAS 478032-07-4)
- 3-[5-(5-hydroxypent-1-ynyl)-1-oxo-isoindolin-2-yl]piperidine-2,6-dione (CAS 2229714-98-9)
- 2-(Diphenylphosphoryl)cyclopent-1-ene-1-carboxylic acid (CAS 885456-90-6)
- (S)-3-amino-2-((4'-fluoro-[1,1'-biphenyl]-2-yl)methyl)propanoic acid hydrochloride (CAS 914644-77-2)
- 6,6-Diethoxy-1,1'-diaza-6lambda6-sila-6,6'-spirobi[bicyclo[3.1.0]Hexane]-2,2',4,4'-tetraene (CAS 1353744-76-9)
- Ethyl (2E)-4-(2-nitrophenoxy)but-2-enoate (CAS 274676-19-6)
- N-(4-Bromobenzyl)ethanamine hydrochloride (CAS 1129306-09-7)
- 5-Ethyl-N-(1-(furan-2-carbonyl)indolin-6-yl)thiophene-2-sulfonamide (CAS 1040661-56-0)
- 3-ethylpentane-3-thiol (CAS 5827-80-5)
- 4-(4-Methyl-1,2,5-oxadiazol-3-yl)thiazol-2-amine hydrobromide (CAS 1216520-26-1)
- 4-Butylbenzyl alcohol (CAS 60834-63-1)
- Insulin B (22-25) (CAS 34367-73-2)
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