8-Hydroxyquinoline-4-sulfonic acid CAS 57392-95-7
| CAS No. | 57392-95-7 |
| Molecular Formula | C9H7NO4S |
| Molecular Weight | 225.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 8-Hydroxyquinoline-4-sulfonic 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.
8-Hydroxyquinoline-4-sulfonic acid (CAS 57392-95-7), molecular formula C9H7NO4S and molecular weight 225.22 g/mol, is a CATO reference standard with documented purity and traceability.
8-Hydroxyquinoline-4-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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H7NO4S |
| Molecular Weight | 225.22 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.) | 1973 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Hydroxyquinoline Standards
- 8-Hydroxyquinoline-2-sulfonic acid (CAS 20946-17-2)
- 8-Hydroxyquinoline-5-sulfonic acid (CAS 84-88-8)
- 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
- 7-Amino-6-(methoxycarbonyl)thieno[2,3-b]pyrazine 1-oxide (CAS 2123445-31-6)
- Ethyl (2-fluorobenzoyl)glycinate (CAS 304657-05-4)
- 6-amino-5-nitro-pyridine-3-sulfonic acid (CAS 62009-38-5)
- Ethyl [(3-fluoro-4-methylphenyl)carbamoyl]formate (CAS 69066-06-4)
- ethyl 1-(1,3-thiazol-2-yl)-1H-pyrazole-4-carboxylate (CAS 1461714-18-0)
- 2',4',6'-Trifluoro-5'-(4-formylphenyl)-[1,1':3',1''-terphenyl]-4,4''-dicarbaldehyde (CAS 2088007-05-8)
- Ethyl (E)-4-(((2-chlorobenzoyl)oxy)imino)-3-methyl-4,5,6,7-tetrahydrobenzofuran-2-carboxylate (CAS 296244-49-0)
- tert-Butyl pyridazin-3-ylcarbamate (CAS 147362-90-1)
- Methyl 4-amino-1-methyl-1H-imidazole-2-carboxylate hydrochloride (CAS 480433-71-4)
- 3,4-Dimethoxythiophene-2-carbaldehyde (CAS 51792-38-2)
- 2-(2-(Pyridin-2-yl)ethyl)aniline (CAS 50385-28-9)
- 2',3',4',9'-Tetrahydrospiro[piperidine-4,1'-pyrido[3,4-b]indole] (CAS 119990-83-9)
- 8-(4-(2-Hydroxyethyl)piperazin-1-yl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione (CAS 671767-88-7)
- Liraglutide Impurity 31 (CAS CATO-C4X-199231)
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