Pyrogallol A.R. Grade 99.8%. Pyrogallic Acid ACS Pyrogallol A.R. Grade 99.8% Synonyms:Pyrogallic Acid; 1,2,3-Trihydroxybenzene; 1,2,3-BenzenetriolMolecular Formula ... months in unopened container. 100kg Pyrogallol A.R. Grade 99.8%, Pyrogallic Acid, 1,2,3-Trihydroxybenzene; 1,2,3-Benzenetriol; CAS 87-66 ...