Description of grades

CR-41 Technical sheet

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Physical Properties
Target Min. Max.
Specific Surface Area (m2 /g) 6.0 5.0 7.0
Mean Particle Size (um) 0.38 0.33 0.46
Bulk Density (lb./ft3) 40 35 45
Specific Gravity 5.6 --- ---
Through 325 Mesh (%) --- 99.98 100
Chemical Properties
Target Min. Max.
ZnO Assay (%) --- 99.9 100
Cadmium Content (ppm) --- 0 10
Copper Content (ppm) --- 0 10
Iron Content (ppm) --- 0 10
Lead Content (ppm) --- 0 30
Heat Loss @ 110°C (%) --- 0 0.07
Ignition Loss @ 825°C (%) --- 0 0.2