5-Hydroxynaphthalene-1-Sulfonic Acid CAS 117-59-9
| CAS No. | 117-59-9 |
| Molecular Formula | C10H8O4S |
| Molecular Weight | 224.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-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 5-Hydroxynaphthalene-1-Sulfonic Acid (CAS 117-59-9), a certified reference material (molecular formula C10H8O4S, MW 224.23 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C10H8O4S |
| Molecular Weight | 224.23 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 |
| Sulfur Atoms | 1 |
Related Hydroxynaphthalene Standards
- 8-Hydroxynaphthalene-1-sulfonic acid (CAS 117-22-6)
- 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)
- 2-Benzyl-3-hydroxynaphthalene-1,4-dione (CAS 15451-41-9)
Recommended Standards
- Lumateperone Impurity 77 (CAS CATO-C4X-220177)
- Lemborexant Impurity 99 (CAS CATO-C4X-304299)
- Nebivolol Impurity 60 (CAS CATO-C4X-196860)
- Triisopropyl phosphate (CAS 513-02-0)
- (2-(3-Methylpyridin-4-yl)piperidin-1-yl)(phenyl)methanone (CAS 1352523-36-4)
- 4-(4-Fluorophenyl)-1H-imidazole 5-(4-Fluorophenyl)-3H-imidazole 65020-70-4 (CAS 65020-70-4)
- 5-Chloro-N-(2-methylpyrazolo[1,5-a]pyrimidin-6-yl)thiophene-2-carboxamide (CAS 1797225-27-4)
- Tonabersat (CAS 175013-84-0)
- 1-(1-Ethoxyethyl)-3-iodo-1H-pyrazole (CAS 1639858-69-7)
- 15-Keto Latanoprost (CAS 135646-98-9)
- 1-(4-(2-Hydroxycyclopropyl)phenyl)ethanone (CAS 1799412-30-8)
- 3-(2-Chloro-5-fluorophenyl)propanoic acid (CAS 847492-00-6)
- (S)-1-(2-Methoxy-4-methylphenyl)ethan-1-amine (CAS 1259779-28-6)
- C-telopeptide (CAS 162929-64-8)
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