... - 135Moisture%0.5 maxHeavy Metalsppm5 maxFe%0.001 maxResidue On Ignition%0.02 maxSulfate%0.005 maxChloride%0.001 max ... Application:It is used in hair dying, dying of suturing materials and for oxygen absorption in gas analysis, photo developing agent ... months in unopened container. 100kg Pyrogallol A.R. Grade 99.8%, Pyrogallic Acid, 1,2,3-Trihydroxybenzene; 1,2,3-Benzenetriol; CAS 87-66-1 EINECS ...