... : C6H6O3 Chemical name: pyrogallol, pyrogallic acid, 1,2,3-trihydroxybenzene, 1,2,3-benzenetriol.. CAS NO. 87-66-1Molecular: C6H6O3MW: 126. ... Chemical name: pyrogallol, pyrogallic acid, 1,2,3-trihydroxybenzene, 1,2,3-benzenetriolRd; 1.45Melt point: 131-135Water: 0.5% maxPurity ...