... is colorless monoclinic system crystal. Assay is 99%min, Used as fluxing agent for aluminium electrolysis ... Properties: M.P.: 1025°C; bulk density: 0.6-1.0g/L, true density: 2. ... standardGB/4291-1999GradeChemical compositions %FALNaSiO2Fe2O3S04P2O5H02Ignition (550°C) Min.Max.Special grade (A)5313320.250.050.70 ... 53.0Note: 1. Molecular proportion range: 1.0-3.0, adjustable to meet the different needs of ...