Synonyms: Cristobalite, Quartz, Sand, Silica CAS: 60676-86-0 Molecular Formula: SiO2 Molecular Weight: 60.08 g/mol Test Specification U.S. Mesh 100 0.0% (Cumulative Retained) U.S. Mesh 140 0.1% (Cumulative Retained) U.S. Mesh 200 0.6% (Cumulative Retained) U.S. Mesh 270 3.2% (Cumulative Retained) U.S. Mesh 325 5.7% (Cumulative Retained) Green Reflectance (Y) 89 Yellow Index (Y1-1) 4.5 Hardness (Mohs) 7 pH (5% suspension) 7 Iron Oxide (Fe2O3)