High Grade Cerium Oxide Contains No Zinc Gordon Glass Cerium Oxide is a high-quality polishing compound for polishing and removal of fine scratches and scuff marks in glass and mirror. Use Felt Polishing Wheel to remove scratches and scuff marks in glass and mirror. Product Information Applications Formula CeO2 They are suitable for recirculatory slurry systems and is compatible with all standard polishing pad interfaces. Appearance Pink or Red Brown Powder Typical Analysis Recommended Slurry Temperature Specifications CeO2 99.7 % 25 C – 40 C (77 F - 104 F) Loss on ignition at 1,000?C 1.00 % max Composition Other Rare Earths Non-Rare Earths La2O3 0.019 % Fe2O3 0.002 % Nd2O3 0.004 % SiO2 0.007 % Sm2O3 0.001 % CaO 0.005 % Y2O3 0.003 % Na2O 0.15 % SrO 0.001 % Physical Properties Dilution and Compatability Melting Point 2500?C The cerium oxide can be used in concentration between 2 and 10 Baume. For shape polishing and straight line beveling, concentration of 2 to 5 Baume is recommended. Specific Gravity 7.3 g/cm3 Composition REO Content 60 - 75% Average Particle Size 2.6 - 2.9 Microns pH 6.5 - 7.5 Solubility Insoluble in water, moderately soluble in strong mineral acids. Stability Slightly hygroscopic, will absorb small amounts of moisture and CO2 from the atmosphere. Complete Technical Data