Xilinx publicly releases Materials Declaration Data Sheets (MDDS) and IPC-1752 for all devices upon production release.
Please follow the below steps to find an MDDS for a particular device:
Here, you will find the MDDS for all packages associated with the chosen device family. Typically, you can also find the IPC under Associated Files.
Alternatively, you can use the search engine on our website with keywords such as <package> material declaration (for example, FTG256 material declaration).