... hydrosulfide(NaHS) 1) Purity:70%min 20ppm 2) Fe:20ppm 3) Flakes,lsolid 4) Used in Minning ... hydrosulfide(NaHS) 1) Purity:70%min 20ppm 2) Fe:20ppm 3) Flakes,lsolid 4) Used in Minning, ... Prompt Specifications:Sodium hydrosulfide(NaHS) Purity:70%min Fe:30ppm Liquid,flakes,Solid Used in Minning,Leather ... 5%max3.5%max3.0%max3.0%maxFe content 30ppm max20ppm max15ppm max Usage:Used as intermediate compound ...