Resorcinol
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| Names | |||
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Preferred IUPAC name
Benzene-1,3-diol
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| Other names
Resorcinol
Resorcin m-Dihydroxybenzene 1,3-Benzenediol 1,3-Dihydroxybenzene 3-Hydroxyphenol m-Hydroquinone m-Benzenediol |
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| Identifiers | |||
108-46-3 
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| 3D model (Jmol) | Interactive image | ||
| ChEBI |
CHEBI:27810 
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| ChEMBL |
ChEMBL24147
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| ChemSpider |
4878
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| ECHA InfoCard | 100.003.260 | ||
| KEGG |
D00133
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| PubChem | 5054 | ||
| UNII |
YUL4LO94HK
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| UN number | 2876 | ||
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| Properties | |||
| C6H6O2 | |||
| Molar mass | 110.1 g/mol | ||
| Appearance | White solid, turns pink on exposure to air, light, and iron | ||
| Odor | Faint | ||
| Density | 1.28 g/cm3, solid | ||
| Melting point | 110 °C (230 °F; 383 K) | ||
| Boiling point | 277 °C (531 °F; 550 K) | ||
| 110 g/100 mL at 20 °C | |||
| Vapor pressure | 0.0002 mmHg (25°C) | ||
| Acidity (pKa) | 9.15 | ||
| -67.26·10−6 cm3/mol | |||
| 2.07±0.02 D | |||
| Pharmacology | |||
| D10AX02 (WHO) S01AX06 (WHO) | |||
| Hazards | |||
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EU classification (DSD)
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Harmful (Xn) Dangerous for the environment (N) |
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| Flash point | 127 °C; 261 °F; 400 K | ||
| Explosive limits | 1.4%-? | ||
| US health exposure limits (NIOSH): | |||
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PEL (Permissible)
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none | ||
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REL (Recommended)
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TWA 10 ppm (45 mg/m3) ST 20 ppm (90 mg/m3) | ||
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IDLH (Immediate danger)
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N.D. | ||
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is ?) |
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| Infobox references | |||
Resorcinol (or resorcin) is a benzenediol (m-dihydroxybenzene).
It is the 1,3-isomer (or meta-isomer) of benzenediol with the formula C6H4(OH)2. Austrian chemist Heinrich Hlasiwetz (1825–1875) is remembered for his chemical analysis of resorcinol and for his part in the first preparation of resorcinol, along with Ludwig Barth, which was published in 1864.
Benzene-1,3-diol is the name recommended by the International Union of Pure and Applied Chemistry (IUPAC) in its 1993 Recommendations for the Nomenclature of Organic Chemistry.
It is produced when any of a large number of resins (e.g., galbanum, asafoetida, etc.) are melted with potassium hydroxide, or by the distillation of Brazilwood extract. It may be prepared synthetically by melting 3-iodophenol, phenol-3-sulfonic acid, or benzene-1,3-disulfonic acid with potassium carbonate; by the action of nitrous acid on 3-aminophenol or on 1,3-diaminobenzene. Many ortho- and para-compounds of the aromatic series (for example, the bromophenols, benzene-para-disulfonic acid) also yield resorcinol on fusion with potassium hydroxide.
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