4-Mercaptoquinoline-8-sulfonic acid CAS 71330-94-4
| CAS No. | 71330-94-4 |
| Molecular Formula | C9H7NO3S2 |
| Molecular Weight | 241.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Mercaptoquinoline-8-sulfonic acid (CAS 71330-94-4), a certified reference material (molecular formula C9H7NO3S2, MW 241.29 g/mol) for analytical method development and quality control.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 4-Mercaptoquinoline-8-sulfonic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 241.29 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures 4-Mercaptoquinoline-8-sulfonic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H7NO3S2 |
| Molecular Weight | 241.29 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.) | 1977 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Mercaptoquinoline Standards
- 4-Mercaptoquinoline-3-sulfonic acid (CAS 502621-93-4)
- 5-Mercaptoquinoline-8-sulfonic acid (CAS 60999-28-2)
- 8-Mercaptoquinoline-5-sulfonic acid (CAS 5825-36-5)
- 8-Mercaptoquinoline-2,4-dicarboxylic acid (CAS 653570-20-8)
- 8-Mercaptoquinoline-4-carboxylic acid (CAS 121689-24-5)
- 3-Mercaptoquinoline-2-carboxylic acid (CAS 61830-01-1)
- 5-Mercaptoquinoline-6-carboxylic acid (CAS 873970-05-9)
- 8-Mercaptoquinoline-5-carboxylic acid (CAS 732219-03-3)
Recommended Standards
- 4-Methoxy-N-(m-tolyl)benzamide (CAS 7464-53-1)
- 4-Hydroxy-N-phenethylbenzamide (CAS 293311-00-9)
- 4-Methoxy-N-(o-tolyl)benzamide (CAS 7464-54-2)
- 4-Cyclohexylidene-2-phenyloxazol-5(4H)-one (CAS 52956-46-4)
- 4-[(E)-[(4-Methoxyphenyl)methylidene]amino]phenyl 2,2-dimethylpropanoate (CAS 331460-52-7)
- 6,8-Dinitro-1,2,3,4-tetrahydroquinoline (CAS 40484-56-8)
- 2-Bromo-5-((tetrahydrofuran-3-yl)oxy)pyrazine (CAS 1086382-90-2)
- 2-(3-Chloroquinoxalin-2-yl)-2-((3,4-dimethylphenyl)sulfonyl)acetonitrile (CAS 730981-89-2)
- 9H-Fluoren-9-ylmethyl N-[(1S)-2-(tert-butoxy)-1-[methoxy(methyl)carbamoyl]ethyl]carbamate (CAS 439685-19-5)
- (5Z)-5-[(2,4-Dimethoxyphenyl)methylene]-4-oxo-2-thioxo-3-thiazolidineacetic acid (CAS 1616632-71-3)
- 2-Methyl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole-5-carboxylic acid (CAS 1368179-03-6)
- 5-((4-Acetylphenoxy)methyl)furan-2-carbaldehyde (CAS 1399664-46-0)
- Dimethyl 2-(Benzyloxy)isophthalate (CAS 1108724-63-5)
- D-allo-Thr7-Semaglutide (CAS CATO-C4X-2226242)
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