1073. 1,2,4-Benzenetriol

Nomenclature

CAS number: 533-73-3
Hydroxyhydroquinone; hydroxyquinol.
C6H6O3; mol wt 126.11.
C 57.14%, H 4.80%, O 38.06%.

Description and 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.

Chemical structure

Properties

Monoclinic prismatic leaflets from ether, mp 141°. Freely sol in water, alcohol, ether, ethyl acetate; almost insol in chloroform, carbon disulfide, ligroin, benzene.

Derivative

Trimethyl ether.
C9H12O3; mol wt 168.19.
C 64.27%, H 7.19%, O 28.54%.

Properties

bp 247°.

Derivative

Triacetate.
C12H12O6; mol wt 252.22.
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.

Use

In gas analysis; 1,2,4-benzenetriol in alkaline soln is just as good an absorbent for oxygen as is pyrogallol.