An MSDS (Material Safety Data Sheet) is a document containing information about the potential hazards of a product, and how to safely handle it. An MSDS is required for all potentially dangerous products and all lithium battery shipments (whether dangerous or not). An MSDS may also be required for potentially dangerous products, like liquids, creams, and powders, just to prove that they aren’t dangerous. Carriers may also request an MSDS for dry or alkaline batteries, to certify they are not lithium based.