Do you have a requirement for high-purity zinc salts with lead levels less than 1 ppm maximum?
Jost Chemical (St. Louis, MO) now manufactures Zinc Oxide USP Low Lead Powder, Zinc Citrate Dihydrate USP Low Lead Fine Granular and Powder, Zinc Ascorbate Monohydrate Powder and Zinc Sulfate USP.
For a complete list of zinc salts and product specifications manufactured by Jost, visit https://www.jostchemical.com/products/zinc/productcode2980/.