3-Hydroxy-1H-pyrazolo[4,3-c]quinoline-6-carboxylic acid CAS 1235659-45-6
| CAS No. | 1235659-45-6 |
| Molecular Formula | C11H7N3O3 |
| Molecular Weight | 229.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Hydroxy-1H-pyrazolo[4,3-c]quinoline-6-carboxylic acid 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.
3-Hydroxy-1H-pyrazolo[4,3-c]quinoline-6-carboxylic acid (CAS 1235659-45-6) is a high-purity analytical reference standard with the molecular formula C11H7N3O3 and a molecular weight of 229.19 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 3-Hydroxy-1H-pyrazolo[4,3-c]quinoline-6-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 229.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-Hydroxy-1H-pyrazolo[4,3-c]quinoline-6-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 | C11H7N3O3 |
| Molecular Weight | 229.19 g/mol |
| Appearance | Pale yellow to 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 3 |
Related Hydroxy Standards
- 3-Hydroxy-1H-pyrazolo[4,3-c]quinoline-7-carboxylic acid (CAS 1171932-64-1)
- 4-Hydroxy-7-methyl-6-nitroquinoline-3-carbonitrile (CAS 919482-00-1)
- 7-Hydroxy-3-oxo-3H-phenoxazine 10-oxide (CAS 550-82-3)
- Ethyl 2-hydroxy-3-(2-nitro-1H-imidazol-1-yl)propanoate (CAS 22813-49-6)
- 3-Hydroxy-2-oxo-7-indolinesulfonic acid (CAS 1353501-00-4)
- (2-(5-hydroxy-4,6-dimethylpyridin-3-yl)vinyl)phosphonic acid (CAS 33475-95-5)
- 5-Hydroxy-1H-indol-6-yl hydrogen sulfate (CAS 96686-60-1)
- 5-Hydroxy-3-[2-(trifluoromethyl)phenyl]isoxazole (CAS 1188055-87-9)
Recommended Standards
- Carbonic Acid 2,5-Dioxopyrrolidin-1-yl (S)-Tetrahydrofuran-d4-3-yl Ester (CAS 1217695-90-3)
- 2-(5-(4-Nitrophenyl)-1H-1,2,4-triazol-3-yl)acetonitrile (CAS 1255780-79-0)
- 5-Oxo-1h,5h-pyrazolo[1,5-a]quinazoline-3-carboxylic acid (CAS 1181458-88-7)
- 5-((tert-Butoxycarbonyl)amino)-1,3,4-oxadiazole-2-carboxylic acid (CAS 1258411-54-9)
- 6-Amino-3-hydroxy-1H-indazole (CAS 59673-74-4)
- Methyl 3-(2,5-Difluorophenyl)-3-oxopropionate (CAS 1268103-31-6)
- 2,7-Naphthyridin-1(2H)-one hydrobromide (CAS 950746-19-7)
- (S)-4,5-difluoro-2-(pyrrolidin-2-yl)benzoic acid (CAS 1213181-39-5)
- 1H-Pyrrolo[3,4-d]pyrimidine (CAS 14529-49-8)
- 3-(3-(4-(Benzyloxy)phenoxy)propoxy)benzaldehyde (CAS 937602-05-6)
- 4-bromofuro[3,2-c]pyridine (CAS 76312-04-4)
- 2-(2-Chloro-5-nitrophenyl)-5-methyl-1H-1,2,4-triazol-3(2H)-one (CAS 114499-57-9)
- 3-(Cyclopropylmethyl)-2-hydroxy-N,N-dimethylbenzamide (CAS 1243439-19-1)
- Insulin Degludec Impurity 26 (CAS CATO-C4X-215726)
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