4-Hydroxy-6-(phenylamino)naphthalene-1-sulfonic acid CAS 5345-77-7
| CAS No. | 5345-77-7 |
| Molecular Formula | C16H13NO4S |
| Molecular Weight | 315.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Hydroxy-6-(phenylamino)naphthalene-1-sulfonic acid is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 4-Hydroxy-6-(phenylamino)naphthalene-1-sulfonic acid (CAS 5345-77-7), a certified reference material (molecular formula C16H13NO4S, MW 315.34 g/mol) for analytical method development and quality control.
Structurally, 4-Hydroxy-6-(phenylamino)naphthalene-1-sulfonic acid (C16H13NO4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 315.34 g/mol, it falls into the moderately-high-molecular-weight range. 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.
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 | 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.) | 1958 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
- 4-Hydroxy-6-(phenylamino)naphthalene-2-sulfonic acid (CAS 119-19-7)
- 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid (CAS 119-40-4)
- 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
- 4-[4-(Ethoxycarbonyl)benzenesulfonamido]butanoic acid (CAS 743451-77-6)
- 5-((4-Methoxyphenyl)sulfonyl)quinolin-8-ol (CAS 61430-95-3)
- 4-(5-Oxo-4-phenyl-2,5-dihydrofuran-3-yl)benzenesulfonamide (CAS 639785-67-4)
- 5-[Isocyano-(toluene-4-sulfonyl)-methyl]-benzo[1,3]dioxole (CAS 428816-43-7)
- (1R,2S)-2-(2,3-dimethylbenzoyl)cyclopentane-1-carboxylic acid (CAS 733740-17-5)
- 1,3-Dibromo-2-chloro-5-nitrobenzene (CAS 20098-47-9)
- 7-Bromo-4-chloro-5-fluorocinnoline (CAS 2759950-33-7)
- (2E)-1-(5-Bromo-6-methoxynaphthalen-2-yl)-3-(dimethylamino)-2-methylprop-2-en-1-one (CAS 338407-63-9)
- Osmium(III) chloride hydrate (CAS 14996-60-2)
- (2S,3R,5R)-1-(tert-Butoxycarbonyl)-5-(methoxycarbonyl)-2-(4-methoxyphenyl)pyrrolidine-3-carboxylic acid (CAS 1217708-41-2)
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- 3-Formyl-4-nitropyridine 1-oxide (CAS 266353-32-6)
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