This document specifies the requirements and guidance for the content, format and exchange relating to material declarations for products. The main intended use of this document is to provide data up and down the supply chain that: " allows organizations to assess products against material and substance requirements, " allows organizations to assess substances used in manufacturing and other product life cycle stages, " allows organizations to use this information in their activities related to environmentally conscious design process and across all product life cycle stages, " allows organisations to obtain information about material efficiency and product circularity of their products. This document specifies mandatory declaration requirements and provides also optional declaration requirements. This document does not suggest any specific method or process to capture material declaration data in the supply chain. However, it provides a data format used to transfer information within the supply chain. Organizations may determine the most appropriate method to capture material declaration data without compromising data utility and quality. This document is intended to allow declaration based on engineering judgement, supplier material declarations, and/or sampling and testing.