Synonym1,4-Benzenediol, p-Benzenediol, Benzohydroquinone, Benzoquinone, p-Benzoquinone Dihydroxybenzene, 1,4-Dihydroxybenzene, p-Dihydroxybenzene, HQ, Hydroquinol p-Hydroquinone, 1,4-Hydroxybenzene, p-Hydroxyphenol, Hydroxyquinone, Paradioxybenzene Pyrogentistic acid, Quinol, 1,4-Benzenediol, Hydroquinone
Density1.330
Auto/Self Ignition Temperaturetemp. 516 c
Slightly Solublein benzene
Moderately Solublein acetone
Odorodorless
pHweakly acidic (aq. solns.)
Melting Point70 c
Vapor Pressure0.00018 mm hg
Molecular weight110.11
Colordiscolored by light and air
Flash Point(tcc) 165 c
Solubilitywater, alcohol, ether, ccl4, oxygenated solvs.
Boiling Point285 c