Definition of pyrogallol in US English:

pyrogallol

noun

Chemistry
  • A weakly acid crystalline compound chiefly used as a developer in photography.

    Alternative name: 1,3,5-trihydroxybenzene; chemical formula: C₆H₃(OH)₃

    • ‘Because of the tanning effect of catechol on emulsion gelatine, it has many of the properties of pyrogallol.’
    • ‘Catechol and pyrogallol may be substituted for hydroquinone, but are not as suitable.’
    • ‘One unit of activity was determined as the amount of enzyme that inhibited the oxidation of pyrogallol by 50%.’
    • ‘SOD was assayed by the pyrogallol method of Marklund and Marklund.’

Pronunciation

pyrogallol

/ˌpīrōˈɡalˌôl/