6-Hydroxy-1H-indole-7-carbaldehyde CAS 19502-40-0
| CAS No. | 19502-40-0 |
| Molecular Formula | C9H7NO2 |
| Molecular Weight | 161.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 6-Hydroxy-1H-indole-7-carbaldehyde is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
6-Hydroxy-1H-indole-7-carbaldehyde (CAS 19502-40-0), molecular formula C9H7NO2 and molecular weight 161.16 g/mol, is a CATO reference standard with documented purity and traceability.
6-Hydroxy-1H-indole-7-carbaldehyde (C9H7NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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.
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 | C9H7NO2 |
| Molecular Weight | 161.16 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 |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Hydroxy Standards
- 7-Hydroxy-1h-indole-3-carbaldehyde (CAS 148563-38-6)
- 3-Hydroxy-1H-indole-2-carbaldehyde (CAS 172984-51-9)
- 4-Hydroxy-1H-indole-5-carbaldehyde (CAS 1781840-96-7)
- 6-Hydroxy-1H-indole-3-carbaldehyde (CAS 192184-71-7)
- 5-Hydroxy-1H-indole-4-carbaldehyde (CAS 19502-27-3)
- 2-Hydroxy-1h-indole-3-carbaldehyde (CAS 861360-36-3)
- 4-Hydroxy-1H-indole-3-carbaldehyde (CAS 81779-27-3)
- 5-Hydroxy-1H-indole-3-carbaldehyde (CAS 3414-19-5)
Recommended Standards
- 2-Acetyl-3H-pyrrolizin-3-one (CAS 195614-02-9)
- (2R,3R,4R)-2,5-Bis(hydroxymethyl)-3,4-dihydro-2H-pyrrole-3,4-diol (CAS 194301-22-9)
- 1-(1H-Pyrazolo[3,4-b]pyridin-4-yl)ethanone (CAS 1956385-45-7)
- 1-(Furo[2,3-b]pyridin-6-yl)ethanone (CAS 193750-68-4)
- 2-Cyclopropylthiophene (CAS 29481-22-9)
- 2-Methyl-1-(3,3,3-trifluoropropyl)piperidin-4-amine (CAS 1341970-62-4)
- Methyl 2-(2-fluorophenyl)-2-hydroxyacetate (CAS 192884-55-2)
- 5-Methyl-1-phenyl-1H-pyrazole-4-sulfonic acid (CAS 1353503-21-5)
- 4-Chloro-6-(4-(2-methoxyethyl)piperazin-1-yl)pyrimidine (CAS 1289021-43-7)
- 2-(Difluoromethyl)-6-fluoro-4-methoxypyridine-3-carbonyl chloride (CAS 1805435-09-9)
- N-[2-Hydroxyphenyl]malonamic acid (CAS 211111-51-2)
- 4-Bromo-5-(difluoromethyl)-6-iodopyridin-3-ol (CAS 1805168-35-7)
- Propyl 2-amino-5-methyl-4-phenylthiophene-3-carboxylate (CAS 905011-61-2)
- Semaglutide impurity 244(Fmoc-His(Fmoc)-Aib-OH) (CAS CATO-C4X-2226244)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com