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2-Naphthol
Chemical compound / From Wikipedia, the free encyclopedia
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2-Naphthol, or β-naphthol, is a fluorescent colorless (or occasionally yellow) crystalline solid with the formula C10H7OH. It is an isomer of 1-naphthol, differing by the location of the hydroxyl group on the naphthalene ring. The naphthols are naphthalene homologues of phenol, but more reactive. Both isomers are soluble in simple alcohols, ethers, and chloroform. 2-Naphthol is a widely used intermediate for the production of dyes and other compounds.
Quick Facts Names, Identifiers ...
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Names | |
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Preferred IUPAC name
Naphthalen-2-ol | |
Other names
2-Hydroxynaphthalene; 2-Naphthalenol; beta-Naphthol; Naphth-2-ol | |
Identifiers | |
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3D model (JSmol) |
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742134 | |
ChEBI | |
ChEMBL | |
ChemSpider |
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ECHA InfoCard | 100.004.712 ![]() |
EC Number |
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27395 | |
KEGG |
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PubChem CID |
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RTECS number |
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UNII | |
UN number | 3077 |
CompTox Dashboard (EPA) |
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Properties | |
C10H8O | |
Molar mass | 144.173 g·mol−1 |
Appearance | Colorless crystalline solid |
Density | 1.280 g/cm3 |
Melting point | 121 to 123 °C (250 to 253 °F; 394 to 396 K) |
Boiling point | 285 °C (545 °F; 558 K) |
0.74 g/L | |
Acidity (pKa) | 9.51 |
-98.25·10−6 cm3/mol | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Harmful when inhaled or swallowed; dangerous to environment, esp. aquatic organisms.[1] |
GHS labelling: | |
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Warning | |
H302, H332, H400 | |
P261, P264, P270, P271, P273, P301+P312, P304+P312, P304+P340, P312, P330, P391, P501 | |
NFPA 704 (fire diamond) | |
Flash point | 161 °C (322 °F; 434 K)[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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