Pyrogallol Tech Grade 99%. Pyrogallol Tech Grade 99% Synonyms:Pyrogallic Acid; 1,2,3-Trihydroxybenzene; 1,2,3- ... White to pale yellow crystalline powderPurity%99.0 minMelting Point°C130 - 133Moisture%0.5 maxResidue On Ignition%0.1 maxApplication:It is used in ... life:12 months in unopened container. 100kg Pyrogallol Tech Grade 99%, Pyrogallic Acid, 1,2,3-Trihydroxybenzene; 1,2,3-Benzenetriol ...