Formula: Na4SiO4N.W.: 122.06Item Specification Testing resultAppearance: colorless,transparent liquid colorless,transparent liquidBe(20c): 40-41 40.2SiO2 26.5%min 28.24%Na2O 8.3%min 8.85%Fe: 0.015%max 0.005%M.R: 3.2-3.4 3.29