Structural Formula Vector Image
Title: 1,2,4-Benzenetriol
CAS Registry Number: 533-73-3
Additional Names: Hydroxyhydroquinone; hydroxyquinol
Molecular Formula: C6H6O3
Molecular Weight: 126.11
Percent Composition: C 57.14%, H 4.80%, O 38.06%
Literature References: Prepd by hydrolysis of the triacetate with H2SO4 in methanol, the triacetate being formed by the action of acetic anhydride on quinone: Vliet, Org. Synth. coll. vol. I (2nd ed, 1941) p 317.
Properties: Monoclinic prismatic leaflets from ether, mp 141°. Freely sol in water, alcohol, ether, ethyl acetate; almost insol in chloroform, carbon disulfide, ligroin, benzene.
Melting point: mp 141°
Derivative Type: Trimethyl ether
Molecular Formula: C9H12O3
Molecular Weight: 168.19
Percent Composition: C 64.27%, H 7.19%, O 28.54%
Properties: bp 247°.
Boiling point: bp 247°
Derivative Type: Triacetate
Molecular Formula: C12H12O6
Molecular Weight: 252.22
Percent Composition: C 57.14%, H 4.80%, O 38.06%
Properties: Needles from abs alc, mp 96.5-97.0°. Readily hydrolyzed by acids or alkalies.
Melting point: mp 96.5-97.0°
Use: In gas analysis; 1,2,4-benzenetriol in alkaline soln is just as good an absorbent for oxygen as is pyrogallol.

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