... ,poison. 2.purity:60%,iron:30ppm,50ppm,80ppm,150ppm 3.purity:52%,iron:20ppm,50ppm,150ppm Item:sodium sulfide Na2SAppearance: Thin flakes, yellow ... :1. Red flakes-purity:60%,iron:1500ppm2. Yellow flakespurity:60%,iron:30ppm,50ppm,80ppm,150ppm purity:52%,iron:20ppm,50ppm,150ppmApplication:Used as ...