Names
Preferred IUPAC name: Benzene-1,4-diol
Other names
Hydroquinone
Idrochinone
Quinol
1,4-Dihydroxybenzene
1,4-Hydroxy benzene
Identifiers
CAS Number: 123-31-9
JSmol: Interactive image
ChEBI: CHEBI:17594
ChEMBL: ChEMBL537
ChemSpider: 764
ECHA InfoCard: 100.004.199
KEGG: D00073
RTECS number: MX3500000
UNII: XV74C1N1AE
Properties
Chemical formula: C6H6O2
Molar mass: 110.11 g·mol
Appearance: white solid
Density: 1.3 g cm, solid
Melting point: 172 °C (342 °F; 445 K)
Boiling point: 287 °C (549 °F; 560 K)
Solubility in water: 5.9 g/100 mL (15 °C)
Vapor pressure: 0.00001 mmHg (20°C)
Magnetic susceptibility: -64.63·10 cm/mol−63
Structure
Dipole moment: D
Pharmacology
ATC code: WHOD11AX11
Hazards
EU classification: Carc. Cat. 3
R-phrases: R22 R40 R41 R43 R50 R68
S-phrases: (S2) S26 S36/37/39 S61
NFPA 704:
Flash point: 165 °C (329 °F; 438 K)
LD
median dose: 490 mg/kg (mammal, oral)
245 mg/kg (mouse, oral)
200 mg/kg (rabbit, oral)
320 mg/kg (rat, oral)
550 mg/kg (guinea pig, oral)
200 mg/kg (dog, oral)
70 mg/kg (cat, oral)
NIOSH
PEL: TWA 2 mg/m3
REL: C 2 mg/m [15-minute]3
IDLH: 50 mg/m3
Related compounds
benzenediols: Pyrocatechol
Related compounds: 1,4-benzoquinone
Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).
Infobox references