| 2-Naphthol | |
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Naphthalen-2-ol |
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Other names
2-Hydroxynaphthalene; 2-Naphthalenol; beta-Naphthol |
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| Identifiers | |
| CAS number | 135-19-3 |
| PubChem | 8663 |
| ChemSpider | 8341 |
| UNII | P2Z71CIK5H |
| KEGG | C11713 |
| ChEBI | CHEBI:10432 |
| ChEMBL | CHEMBL14126 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | C10H8O |
| Molar mass | 144.17 g mol−1 |
| Appearance | Colorless crystalline solid |
| Density | 1.217 g/cm3 |
| Melting point |
123 °C, 396 K, 253 °F |
| Boiling point |
285 °C, 558 K, 545 °F |
| Solubility in water | 0.74 g/L |
| Acidity (pKa) | 9.51 |
| Hazards | |
| R-phrases | R20 R22 R50 |
| S-phrases | S24 S25 S61 |
| Main hazards | Harmful when inhaled or swallowed; dangerous to environment, esp. aquatic organisms.[1] |
| Flash point | 161 °C (322 °F)[1] |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
2-Naphthol, or β-naphthol, is a colorless crystalline solid with the formula C10H7OH. It is an isomer of 1-naphthol, differing by the location of the hydroxyl group on naphthalene. The naphthols are naphthalene homologues of phenol, with the hydroxyl group being more reactive than in the phenols. Both isomers are soluble in simple alcohols, ethers, and chloroform. They can be used in the production of dyes and in organic synthesis. For example, 2-naphthol reacts to form BINOL.