CHEMICAL ANALYSIS: 
ZnO purity99-100.5%
Identificationpasses USP
Alkalinitypasses USP
L.O.I. 500 °C1.0% max.
Carbonatepasses
Iron & other heavy metalspasses
Leadpasses
Arsenic6 ppm max.
PHYSICAL ANALYSIS: 
Surface Area2.7-3.9m2/gr.
Colorvery white
Mean Diameter0.27-0.40 microns
PACKING:                      50lb. boxes
ORIGIN:                          USA