Description Zirconium Carbide, Powder -325 mesh, 99.5% (Metals Basis, ex Hf), 50g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Gray Appearance (Form) Crystalline powder Assay (Gravimetric as Zr) 89% Assay (Metals Basis, ex Hf) 99.5% Melting Point 3540ºC Particle Size (mesh) -325 Total Metallic Impurities (ppm) Hf <200 X-Ray Diffraction Conforms to structure CAS: 12070-14-3 FORMULA: ZrC