... red flake 1500ppm, and yellow flake 150ppm, 50ppm, 30ppm Product name: Sodium Sulphide FlakesMolecular Formula: Na2SMolecular Weight: 78.04CAS ... Number: 1313-82-2H.S.CODE: 28301010U.N NO: 1849Dangerous Class: 82. Appearance: Thin flakes, yellow or red, ... alkaline solution, easily oxidized when exposed to air.3. Specifications: 1. Sodium Sulphide Red FlakesNa2S: 60%minFe: 1500ppm maxNa2CO3: 5 ...