Quinoline-6-sulfonic acid CAS 65433-95-6
| CAS No. | 65433-95-6 |
| Molecular Formula | C9H7NO3S |
| Molecular Weight | 209.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Quinoline-6-sulfonic acid (C9H7NO3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 209.22 g/mol, it falls into the medium-molecular-weight range. 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).
Quinoline-6-sulfonic acid (CAS 65433-95-6), molecular formula C9H7NO3S and molecular weight 209.22 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C9H7NO3S |
| Molecular Weight | 209.22 g/mol |
| 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.) | 1975 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Quinoline Standards
- Quinoline-4-sulfonic acid (CAS 6046-42-0)
- Quinoline-7-sulfonic acid (CAS 65433-96-7)
- Quinoline-2-sulfonamide (CAS 952651-45-5)
- Quinoline-4-sulfonamide (CAS 270902-37-9)
- Quinoline-5-sulfonamide (CAS 415913-05-2)
- Quinoline-6-sulfonamide (CAS 89770-31-0)
- Quinoline-8-sulfonamide (CAS 35203-91-9)
- quinoline-2-sulfonyl fluoride (CAS 878376-36-4)
Recommended Standards
- N-Cyclopropyl-4-fluoro-2-methoxybenzamide (CAS 2624416-94-8)
- 6046-38-4 6534AE C9H7NO3S Quinoline-2-sulfonic acid (CAS 6046-38-4)
- N-(5-Fluoro-2-methylphenyl)-3-oxobutanamide (CAS 81761-36-6)
- 1683AF 4-[(3-Fluorophenyl)azo]-morpholine 883542-75-4 C10H12FN3O (CAS 883542-75-4)
- Fedovapagon (CAS 347887-36-9)
- 5-(2-Methoxyethyl)-2-(methylamino)pyrimidin-4-ol (CAS 1403564-57-7)
- (2-(2-Hydroxypiperidin-1-yl)-4-methylpyrimidin-5-yl)boronic acid (CAS 2225153-50-2)
- 4-Amino-9-fluoro-2,3,4,5-tetrahydrobenzo[b]oxepin-5-ol hydrochloride (CAS 1484681-73-3)
- (4-Amino-2-((4-chlorophenyl)amino)thiazol-5-yl)(3-(trifluoromethyl)phenyl)methanone (CAS 339020-09-6)
- 1-Ethyl-3-(2-hydroxyethyl)urea (CAS 29346-51-8)
- 2-Chloro-3-formyl-N,N-dimethyl-1H-indole-5-sulfonamide (CAS 535925-58-7)
- N-(thiophen-2-ylmethyl)prop-2-yn-1-amine (CAS 53175-36-3)
- 8-Methyl-5,6,7,8-tetrahydro-1,6-naphthyridine (CAS 83082-13-7)
- Semaglutide impurity 74 (CAS CATO-C4X-222674)
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