8-Hydroxynaphthalene-1-sulfonic acid CAS 117-22-6
| CAS No. | 117-22-6 |
| Molecular Formula | C10H8O4S |
| Molecular Weight | 224.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
8-Hydroxynaphthalene-1-sulfonic acid (C10H8O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO supplies 8-Hydroxynaphthalene-1-sulfonic acid (CAS 117-22-6), a certified reference material (molecular formula C10H8O4S, MW 224.23 g/mol) for analytical method development and quality control.
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 8-Hydroxynaphthalene-1-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 | C10H8O4S |
| Molecular Weight | 224.23 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.) | 1957 |
| Sulfur Atoms | 1 |
Related Hydroxynaphthalene Standards
- 7-Hydroxynaphthalene-1-sulfonic acid (CAS 132-57-0)
- 2-Hydroxynaphthalene-1-sulfonic acid (CAS 567-47-5)
- 3-Hydroxynaphthalene-1-sulfonic acid (CAS 6357-85-3)
- 4-Hydroxynaphthalene-2-sulfonic acid (CAS 3771-14-0)
- 6-Hydroxynaphthalene-2-sulphonic acid (CAS 93-01-6)
- 7-Hydroxynaphthalene-2-sulfonic acid (CAS 92-40-0)
- 5-Hydroxynaphthalene-1-Sulfonic Acid (CAS 117-59-9)
- 2-Benzyl-3-hydroxynaphthalene-1,4-dione (CAS 15451-41-9)
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- Semaglutide impurity 260 (CAS CATO-C4X-2226260)
Why CATO?
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