5-Nitro-1H-indole-7-carboxylic acid CAS 1167056-38-3
| CAS No. | 1167056-38-3 |
| Molecular Formula | C9H6N2O4 |
| Molecular Weight | 206.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Nitro-1H-indole-7-carboxylic acid (C9H6N2O4) contains an amino-acid-derived structure, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 5-Nitro-1H-indole-7-carboxylic acid (CAS 1167056-38-3), a certified reference material (molecular formula C9H6N2O4, MW 206.15 g/mol) for analytical method development and quality control.
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), 5-Nitro-1H-indole-7-carboxylic acid 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 | C9H6N2O4 |
| Molecular Weight | 206.15 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 2 |
Related Nitro Standards
- 2-methyl-6-nitro-4H-3,1-benzoxazin-4-one (CAS 10073-89-9)
- 6-Nitro-1H-indole-2-carboxylic acid (CAS 10242-00-9)
- 6-Nitro-1H-indole-4-carboxylic acid (CAS 1082040-51-4)
- 4-Nitro-1H-indole-3-carboxylic acid (CAS 123604-27-3)
- 5-Nitro-1H-indole-6-carboxylic acid (CAS 1352397-28-4)
- 3-Nitro-2,4-quinolinediol (CAS 15151-57-2)
- 4-Nitro-1H-indole-6-carboxylic acid (CAS 1547093-97-9)
- 4-Nitro-1h-indole-2-carboxylic acid (CAS 16732-60-8)
Recommended Standards
- 2,2-Bis[(methoxycarbonyl)amino]acetic Acid (CAS 110599-27-4)
- 1H-Pyrrolo[3,2-b]pyridine-3,5-dicarboxylic acid (CAS 1190311-22-8)
- 6-Amino-5-nitrochromen-2-one (CAS 109143-64-8)
- 1H-Pyrrolo[3,2-b]pyridine-3,6-dicarboxylic acid (CAS 1190316-14-3)
- (4-Bromonaphthalen-1-yl)hydrazine hydrochloride (CAS 197511-46-9)
- 4-[(2,5-Dichlorophenyl)sulfanyl]-2-(methylsulfanyl)quinazoline (CAS 477845-85-5)
- 3-Bromo-4-(dibromomethyl)-5-hydroxy-2(5H)-furanone (CAS 132059-53-1)
- 2-(3-Fluorophenyl)oxan-4-one (CAS 1341549-86-7)
- N-Isopropylpiperidine-4-amine dihydrochloride (CAS 870301-32-9)
- 3-Cyclopropoxy-5-isopropyl-N-methylpyridin-4-amine (CAS 1243442-76-3)
- 3,5-Difluoropicolinimidamide hydrochloride (CAS 298709-32-7)
- Methyl 4-bromo-7-methoxybenzo[d][1,3]dioxole-5-carboxylate (CAS 81474-46-6)
- Tert-butyl 2-(2-hydroxypropyl)pyrrolidine-1-carboxylate (CAS 1536327-97-5)
- Semaglutide impurity 194 (CAS CATO-C4X-2226194)
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