5,6-Dihydroxy-1-methyl-1H-indole-2-carboxylic acid CAS 126434-73-9
| CAS No. | 126434-73-9 |
| Molecular Formula | C10H9NO4 |
| Molecular Weight | 207.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5,6-Dihydroxy-1-methyl-1H-indole-2-carboxylic acid (CAS 126434-73-9) is a high-purity analytical reference standard with the molecular formula C10H9NO4 and a molecular weight of 207.18 g/mol.
5,6-Dihydroxy-1-methyl-1H-indole-2-carboxylic acid (C10H9NO4) 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. 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).
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 | C10H9NO4 |
| Molecular Weight | 207.18 g/mol |
| Appearance | Off-white to pale 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 1 |
Related Dihydroxy Standards
- Methyl 5,6-dihydroxy-1H-indole-2-carboxylate (CAS 10131-14-3)
- Methyl 4,5-dihydroxy-1H-indole-7-carboxylate (CAS 138106-27-1)
- 2-(5,6-Dihydroxy-1H-indol-3-yl)acetic acid (CAS 67615-73-0)
- 1-(6,7-Dihydroxy-3,4-dihydroisoquinolin-2(1H)-yl)ethanone (CAS 140865-98-1)
- 6,7-Dihydroxy-1-methylquinoline-4(1H)-thione (CAS 127133-92-0)
- 2-(1,6-Dihydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetic acid (CAS 1196473-70-7)
- 3,4-Dihydroxy-2-(3-methylbut-2-en-1-yl)benzaldehyde (CAS 157027-24-2)
- 6,7-Dihydroxy-8-methoxy-2H-chromen-2-one (CAS 108221-59-6)
Recommended Standards
- 6-(2,5-Difluorophenyl)pyridin-3-ol (CAS 1261937-03-4)
- Methyl 3-nitro-4-vinylbenzoate (CAS 126759-36-2)
- 2-(2,3-Difluorophenyl)-5-hydroxy-pyridine (CAS 1261765-40-5)
- 5-Methoxy-4-nitro-2,3-dihydro-1H-inden-1-one (CAS 1273655-86-9)
- Methyl 2-oxo-4-phenylbut-3-enoate (CAS 6395-86-4)
- 4-Bromocoumarin, 97% (CAS 938-40-9)
- 4-(3-(2,3-Dichlorobenzoyl)-1H-pyrrolo[2,3-b]pyridin-4-yl)benzamide (CAS 858118-97-5)
- 2-(4-Iodophenyl)pyrrolidine hydrochloride (CAS 1423027-87-5)
- Ambrisentan Impurity 6 (CAS 1007358-76-0)
- 5-(Difluoromethyl)-6-fluoronicotinic acid (CAS 1804756-53-3)
- 1-(3-(1h-Pyrrol-1-yl)phenyl)ethan-1-one (CAS 154559-69-0)
- 7-Amino-6-azaindole (CAS 165669-36-3)
- Pitavastatin Impurity 42 (CAS CATO-C4X-103742)
- Semaglutide Impurity 143 (CAS CATO-C4X-2226143)
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