Composition of Mixture Chemical Name CAS # % (by weight) Crystalline Silica (quartz) 14808-60-7 70.0 – 99.5 Aluminum Oxide 1344-28-1 0.0 – 19.0 Iron Oxide 1309-37-1 0.0 – 2.0 Potassium Oxide 12136-45-7 0.0 – 12.0 Calcium Oxide 1305-78-8 0.0 – 1.1 Titanium Oxide 13463-67-7 0.0 – 0.7 Note: Individual composition of hazardous constituents may vary by location and/or production lots.