Description Calcium Oxide (Quicklime), 95+%, 50 lb. For Research & Development Not for drug, human, animal, or food use Specifications: Appearance (Color) Beige Appearance (Form) PowderAssay (Available CaO) 95+%Particle Size (Mesh) -325CaCO3 <4%Fe2O3 <0.5%Loss on Drying <5%MgO <1.5%SiO2 <1%Total CaO 95+% CAS: 1305-78-8 FORMULA: CaO