... %. Pyrogallic Acid ACS Pyrogallol A.R. Grade 99.8% Synonyms:Pyrogallic Acid; 1,2,3-Trihydroxybenzene; 1,2, ... Solution ClearPurity%99.80 minMelting PointoC131 - 135Moisture%0.5 maxHeavy Metalsppm5 maxFe%0.001 maxResidue On Ignition%0.02 maxSulfate%0.005 maxChloride%0.001 max ... :12 months in unopened container. 100kg Pyrogallol A.R. Grade 99.8%, Pyrogallic Acid, 1,2,3-Trihydroxybenzene; 1,2,3 ...