4-Nitro-2-(pyridin-2-yl)-1H-indole CAS 242794-69-0
| CAS No. | 242794-69-0 |
| Molecular Formula | C13H9N3O2 |
| Molecular Weight | 239.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Nitro-2-(pyridin-2-yl)-1H-indole (C13H9N3O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
4-Nitro-2-(pyridin-2-yl)-1H-indole (CAS 242794-69-0) is a high-purity analytical reference standard with the molecular formula C13H9N3O2 and a molecular weight of 239.23 g/mol.
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.
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 | C13H9N3O2 |
| Molecular Weight | 239.23 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.) | 2025 |
| Nitrogen Atoms | 3 |
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Recommended Standards
- 4-Hydroxybenzo[h]quinoline-3-carboxylic acid (CAS 35957-14-3)
- 4-Oxo-1,4-dihydrobenzo[h]quinoline-3-carboxylic acid (CAS 51726-83-1)
- 4-Hydroxybenzo[h]quinoline-2-carboxylic acid (CAS 855283-82-8)
- 5-((tert-Butoxycarbonyl)amino)pyrazine-2-carboxylic acid (CAS 891782-63-1)
- Tert-butyl o-methylhomoserinate (CAS 1894245-73-8)
- 5-Chloro-1H-imidazo[4,5-b]pyridine-2-carboxylic acid (CAS 933750-74-4)
- 2-Methyl-6-(trimethylsilyl)pyridine (CAS 13737-10-5)
- methyl 1-amino-4,4-difluorocyclohexane-1-carboxylate (CAS 885498-55-5)
- 1-[(3-thien-3-yl-1,2,4-oxadiazol-5-yl)methyl]piperazine hydrochloride (CAS 1052550-57-8)
- 2,4,5-Trichlorophenyl-4'-nitrophenyl ether (CAS 22532-68-9)
- (Octahydro-3aH-isoindol-3a-yl)methanol (CAS 1824189-03-8)
- (E)-4,4,5,5-Tetramethyl-2-(oct-1-en-1-yl)-1,3,2-dioxaborolane (CAS 83947-55-1)
- 3-Chloroquinoline-2-carboxylic acid (CAS 1803567-61-4)
- (2S)-2-amino-4-(hydroxymethylphosphinyl)butanoyl-L-alanyl-L-alanine (2S)-2-amino-4-[hydroxy(methyl)phosphinoyl]butyryl-L-alanyl-L-alanine 2-Amino-4-(methylphosphino)butyrylalanylalanine 35597-43-4 Antibiotic SF 1293 Bialaphos CHEBI:3088 L-phosphinothricyl-L-alanyl-L-alanine N-{(2S)-2-amino-4-[hydroxy(methyl)phosphoryl]butanoyl}-L-alanyl-L-alanine PTT Phosphinothricylalanylalanine bilanafos gamma-(Hydroxymethylphosphinyl)-L-alpha-aminobutyryl-L-alanyl-L-alanine phosphinothricin tripeptide (CAS 35597-43-4)
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