6,7-Dimethoxy-1H-indole-2-carboxylic acid CAS 31165-16-9
| CAS No. | 31165-16-9 |
| Molecular Formula | C11H11NO4 |
| Molecular Weight | 221.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 6,7-Dimethoxy-1H-indole-2-carboxylic acid.
6,7-Dimethoxy-1H-indole-2-carboxylic acid (CAS 31165-16-9), molecular formula C11H11NO4 and molecular weight 221.21 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 6,7-Dimethoxy-1H-indole-2-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 221.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C11H11NO4 |
| Molecular Weight | 221.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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.) | 1965 |
| Nitrogen Atoms | 1 |
Related Dimethoxy Standards
- 4,6-Dimethoxy-1h-indole-2-carboxylic acid (CAS 105776-11-2)
- 4,7-Dimethoxy-1h-indole-2-carboxylic acid (CAS 31271-83-7)
- 5,7-Dimethoxy-1H-indole-2-carboxylic acid (CAS 27508-88-9)
- 5,7-Dimethoxy-2-methyl-4H-benzo[d][1,3]oxazin-4-one (CAS 628686-77-1)
- 6,7-Dimethoxy-2-methyl-4H-benzo[d][1,3]oxazin-4-one (CAS 6286-65-3)
- 4,5-Dimethoxy-2-(2h-tetrazol-5-yl)aniline (CAS 53967-59-2)
- 2,4-Dimethoxy-5-(trifluoromethyl)aniline (CAS 228401-47-6)
- 4,5-Dimethoxy-2-(trifluoromethyl)aniline (CAS 500698-46-4)
Recommended Standards
- 5-Nitro-6-(pyridin-3-yl)piperidin-2-one (CAS 368835-84-1)
- 5-Methyl-4-((4-methyl-1H-pyrazol-1-yl)methyl)isoxazole-3-carboxylic acid (CAS 956628-37-8)
- 6-Amino-2-(furan-2-yl)-5-(2-hydroxyethyl)pyrimidin-4(1H)-one (CAS 61378-86-7)
- 5-[(dimethyl-1,2-oxazol-4-yl)methyl]furan-2-carboxylic acid (CAS 842974-74-7)
- Methyl 5,6-Dimethoxybenzothiophene-2-carboxylate (CAS 35212-99-8)
- Furano(2’’，3’’：7，6)-4’-hydroxyflavanone (CAS 1454619-70-5)
- N-Ethyl-2,3,3,4,4,4-hexafluoro-2-(trifluoromethyl)butanamide (CAS 111736-89-1)
- 2-Cyclopropoxyterephthalic acid (CAS 1243386-25-5)
- 1-(6-Methyl-2-pyridinyl)-N-[(Z)-(4-nitrophenyl)methylidene]-1H-imidazole-4-carbohydrazide (CAS 478077-74-6)
- 4-Chloro-2-(4-ethoxy-3-methoxyphenyl)quinoline-6-sulfonyl fluoride (CAS 196813-43-1)
- TCO-PEG8-acid (CAS 2353410-03-2)
- 4-Propylthiazole-5-carboxylic acid (CAS 81569-65-5)
- (2R,3S)-2-(Boc-amino)-3-hydroxy-4-methylpentanoic Acid (CAS 182959-73-5)
- Tirzepatide Impurity 43 (CAS CATO-C4X-324043)
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