Sodium hydrosulfide(NaHS) 1) Purity:70%min 2) Fe:30ppm 3) Flakes,lsolid 4) Used in Minning,Leather Making,Textile Specifications:Sodium hydrosulfide(NaHS) Purity:70 ... %min Fe:30ppm Liquid,flakes,Solid Used in Minning,Leather making, ... .Should not be stored and transported with acid. Sodium Hydrosulfide-NaHS flakes