8-Hydroxyquinoline-5-sulfonic acid CAS 84-88-8
| CAS No. | 84-88-8 |
| Molecular Formula | C9H7NO4S |
| Molecular Weight | 225.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 8-Hydroxyquinoline-5-sulfonic acid (CAS 84-88-8), a certified reference material (molecular formula C9H7NO4S, MW 225.22 g/mol) for analytical method development and quality control.
8-Hydroxyquinoline-5-sulfonic acid (C9H7NO4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone 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).
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.
Physical & Chemical Properties
| Molecular Formula | C9H7NO4S |
| Molecular Weight | 225.22 g/mol |
| Purity | >95% |
| 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.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Hydroxyquinoline Standards
- 8-Hydroxyquinoline-2-sulfonic acid (CAS 20946-17-2)
- 8-Hydroxyquinoline-4-sulfonic acid (CAS 57392-95-7)
- 3-Acetyl-2-hydroxyquinoline-4-carboxylic acid (CAS 84443-15-2)
- 6-acetyl-4-hydroxyquinoline-2-carboxylic acid (CAS 91493-55-9)
- 6-acetyl-4-hydroxyquinoline-3-carboxylic acid (CAS 873969-88-1)
- 7-Acetyl-4-hydroxyquinoline-3-carboxylic acid (CAS 63463-21-8)
- 8-Ethyl-4-hydroxyquinoline-3-carbohydrazide (CAS 1315373-86-4)
- 6-Ethyl-4-hydroxyquinoline-3-carbohydrazide (CAS 1329807-25-1)
Recommended Standards
- Ethyl (2-fluorobenzoyl)glycinate (CAS 304657-05-4)
- Ethyl [(3-fluoro-4-methylphenyl)carbamoyl]formate (CAS 69066-06-4)
- 7-Amino-6-(methoxycarbonyl)thieno[2,3-b]pyrazine 1-oxide (CAS 2123445-31-6)
- Ethyl 2-((4-fluorobenzyl)amino)-2-oxoacetate (CAS 828298-11-9)
- N-[(1Z)-1,2-Dicyano-2-(2,5-dimethyl-1H-pyrrol-1-yl)eth-1-en-1-yl]cyclohexanecarboxamide (CAS 860789-64-6)
- 1,4-Bis(4,5-dihydrooxazol-2-yl)butane (CAS 36931-59-6)
- tert-butyl N-[2-(hydroxymethyl)cyclopropyl]carbamate (CAS 1781896-81-8)
- 2-(4-Phenylthiazol-2-yl)ethan-1-ol (CAS 696602-83-2)
- 4-Bromo-3-chloro-5,7-difluoroquinoline (CAS 1209122-08-6)
- (S)-4-(Boc-amino)-2-hydroxybutanoic Acid (CAS 207305-60-0)
- Ruxolitinib Impurity 226 (CAS CATO-C4X-2058226)
- 3-Methoxy-N-(7-methylbenzo[1,2-d:3,4-d']bis(thiazole)-2-yl)benzamide (CAS 361482-05-5)
- 3-((4-Ethoxyphenyl)sulfonyl)-7-fluoro-1-methylquinolin-4(1H)-one (CAS 1326915-46-1)
- Bradykinin-Like Neuropeptide (Aplysia californica) (H-1654.0001) (CAS 165174-60-7)
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