4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid CAS 119-40-4
| CAS No. | 119-40-4 |
| Molecular Formula | C16H13NO4S |
| Molecular Weight | 315.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid (C16H13NO4S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid (CAS 119-40-4), a certified reference material (molecular formula C16H13NO4S, MW 315.34 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.
CATO manufactures 4-Hydroxy-7-(phenylamino)naphthalene-2-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 | C16H13NO4S |
| Molecular Weight | 315.34 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
- 4-Hydroxy-6-(phenylamino)naphthalene-2-sulfonic acid (CAS 119-19-7)
- 4-Hydroxy-6-(phenylamino)naphthalene-1-sulfonic acid (CAS 5345-77-7)
- 1-Ethyl-4-hydroxy-2-oxo-N-(thiazol-2-yl)-1,2-dihydroquinoline-3-carboxamide (CAS 167565-15-3)
- 4-Hydroxy-2-(1-hydroxyethyl)-N-(thiazol-2-yl)quinoline-3-carboxamide (CAS 89441-35-0)
- Methyl 4-((2-hydroxy-4-methoxybenzylidene)amino)-2-methoxybenzoate (CAS 477858-55-2)
- N-(3-Hydroxy-4-(hydroxymethyl)cyclopentyl)-2-(naphthalen-2-yloxy)acetamide (CAS 1421453-08-8)
- (9α,13α,14α)-4-Hydroxy-3,7-dimethoxy-7,8-didehydromorphinan-6-one (CAS 240131-71-9)
- 4-Hydroxy Trimethoprim-d9 (CAS 1794752-40-1)
Recommended Standards
- 3-[[(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)oxy]methyl]-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-1-yloxy (CAS 1214132-79-2)
- Methyl 1-(benzenesulfonyl)-1H-indole-3-carboxylate (CAS 116325-17-8)
- 4-(4-Fluorophenyl)-4-oxo-2-[(1-phenylethyl)amino]butanoic acid (CAS 1214217-33-0)
- 1-Cyclopropyl-6-fluoro-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carbaldehyde (CAS 110719-57-8)
- 1-(4-Hydroxypiperidin-1-yl)propan-1-one (CAS 202647-17-4)
- 2-((3-Cyano-6-phenyl-4-(p-tolyl)pyridin-2-yl)thio)-N-(4-nitrophenyl)acetamide (CAS 332127-79-4)
- Ethyl 6-(2-chloro-6-fluorophenyl)-6-oxohexanoate (CAS 951887-11-9)
- 2-(3-Bromophenyl)propan-1-ol (CAS 81310-68-1)
- 2-Amino-3-(4-chloro-2-nitrophenyl)propanoic acid (CAS 56433-05-7)
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