When sourcing Industrial Zinc Oxide, the price is primarily driven by purity levels (typically 99.5% to 99.7%) and the production method (French Process vs. American Process). The French Process (Indirect Method) yields higher purity and smaller particle sizes, which is essential for high-end applications. You must also verify the Specific Surface Area (BET) and Heavy Metal Content (Pb, Cd, Cu), as lower impurity levels often command a premium price but ensure better chemical stability in your end product.