4-Hydroxynaphthalene-2-sulfonic acid CAS 3771-14-0
| CAS No. | 3771-14-0 |
| Molecular Formula | C10H8O4S |
| Molecular Weight | 224.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C10H8O4S, 4-Hydroxynaphthalene-2-sulfonic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 224.23 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
4-Hydroxynaphthalene-2-sulfonic acid (CAS 3771-14-0), molecular formula C10H8O4S and molecular weight 224.23 g/mol, is a CATO reference standard with documented purity and traceability.
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 | 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.) | 1958 |
| 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)
- 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)
Recommended Standards
- 4-(4-Fluorophenyl)oxane-4-carboxylic acid (CAS 473706-11-5)
- 4-methyl-6-(trifluoromethyl)-2H-pyrazolo[3,4-b]pyridin-3-amine (CAS 832740-69-9)
- 4-(3-Fluorophenyl)tetrahydro-2H-pyran-4-carboxylic acid (CAS 919016-93-6)
- 5-(2,3-Difluorophenyl)thiophene-2-carbaldehyde (CAS 887987-08-8)
- 1-(Pyridin-2-ylsulfonyl)piperidin-4-amine hydrochloride (CAS 1353958-73-2)
- 1-Bromo-3-ethoxy-5-methoxybenzene (CAS 1235566-05-8)
- 4-(4-Chlorophenyl)-1,2,3-thiadiazole-5-carboxylic acid (CAS 1087605-48-8)
- 4-(3-Chlorophenyl)-5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one (CAS 117892-18-9)
- 2-(4-Thiazolyl)acetic Acid Hydrochloride (CAS 1225286-62-3)
- Cefditoren Impurity 1 (CAS 148774-47-4)
- Ledipasvir Impurity 58 (CAS CATO-C4X-331358)
- 5,7-Dichloro-3-methylpyrazolo[1,5-a]pyrimidine (CAS 939979-43-8)
- 2-((2,4-Dimethylphenyl)thio)ethanol (CAS 685892-25-5)
- Semaglutide Impurity 122 (CAS CATO-C4X-2226122)
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