5-Methyl-7-nitro-1h-indole-2-carboxylic acid CAS 90771-56-5
| CAS No. | 90771-56-5 |
| Molecular Formula | C10H8N2O4 |
| Molecular Weight | 220.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Methyl-7-nitro-1h-indole-2-carboxylic acid (CAS 90771-56-5), molecular formula C10H8N2O4 and molecular weight 220.18 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H8N2O4, 5-Methyl-7-nitro-1h-indole-2-carboxylic acid contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 220.18 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.
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.
Physical & Chemical Properties
| Molecular Formula | C10H8N2O4 |
| Molecular Weight | 220.18 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.) | 1982 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- 2-Nitro-5-(prop-2-yn-1-ylamino)benzoic acid (CAS 1019386-49-2)
- Methyl 6-nitro-1H-indole-4-carboxylate (CAS 1082040-42-3)
- Methyl 5-nitro-1H-indole-7-carboxylate (CAS 1082040-74-1)
- 2-(6-Nitro-1H-indol-1-yl)acetic acid (CAS 1095507-43-9)
- 3-Methyl-7-nitro-1H-indole-2-carboxylic acid (CAS 115058-18-9)
- 1-methyl-3-nitro-1,2,3,4-tetrahydroquinoline-2,4-dione (CAS 1172850-09-7)
- 6-Nitro-1h-indol-3-yl acetate (CAS 1306604-44-3)
- Methyl 5-nitro-1H-indole-6-carboxylate (CAS 1352394-34-3)
Recommended Standards
- 5-Methyl-4-nitro-1H-indole-2-carboxylic acid (CAS 61149-53-9)
- 5-Nitroindole-3-acetic Acid (CAS 79473-05-5)
- 5-Methyl-2-(3-nitrophenyl)-1H-1,2,4-triazol-3(2H)-one (CAS 97538-37-9)
- 6-Hydroxy-4-methyl-2-oxo-2H-1-benzopyran-3-carboxylic acid (CAS 435297-35-1)
- 2-(1,4-Dimethylpiperidin-4-yl)acetic acid (CAS 933726-44-4)
- 4-Chloro-6-(1-methylethoxy)-pyrimidine (CAS 83774-13-4)
- (5-Methyl-6-morpholinopyridin-3-yl)methanamine (CAS 1355182-55-6)
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- (R)-3-((tert-Butoxycarbonyl)amino)-3-(3,4-dichlorophenyl)propanoic acid (CAS 1241681-15-1)
- 4-(4-Bromophenoxy)benzene-1,2-diamine (CAS 43156-11-2)
- (3-Fluoro-4-(4-methylpiperidine-1-carbonyl)phenyl)boronic acid (CAS 1449132-53-9)
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- Methyl 4-vinylbicyclo[2.2.2]octane-1-carboxylate (CAS 719274-85-8)
- (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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