The Center for the Polyurethanes Industry (CPI) prepared this guidance document to provide basic principles to users receiving, unloading and handling Toluene Diisocyanate (TDI) and/or various grades 1 in a variety of packagings. This document is not comprehensive. It summarizes some, but not all, U.S. Department of Transportation (DOT) regulatory requirements and industry best practices regarding receiving, unloading and handling of TDI. These guidelines should not be interpreted in a manner that might conflict with existing international, national, state or local laws and regulations. Standards, laws, and requirements can change and have precedence over these guidelines. Consult with appropriate legal counsel to verify applicable standard and requirements.