This 500g bottle contains laboratory-grade granular zinc at 20 mesh, supplied by Innovating Science under the Curated Chemical Collection line. Zinc is commonly used as a reducing agent, a source of zinc ions in aqueous chemistry, and in classic reactions such as the reduction of copper sulfate. Intended for lab and research use in chemistry and materials-science classrooms and labs. Each bottle is printed with safe handling and storage instructions, and an SDS is available on request. Manufactured in the United States. For laboratory use only — not for drug, food, or household use.