The Food safe version of ProSoft® PUL, now rebranded as ProSoft FoodSAFE® PUL, meets the requirements of 21 CFR 175.300 and “may be safely used as the food-contact surface of articles intended for use in producing, manufacturing, packing, processing, preparing, treating, packaging, transporting, or holding food”.
Basically any material that comes into contact with food should not impart any toxic or harmful chemicals to the food it touches. This applies to all the items that come into contact with food during preparation, processing, packaging and storage of food and even when consuming it.
In USA, the United States Food and Drug Administration regulates all aspects of food preparation, processing, packaging, labeling and storage and these regulations are laid out in Title 21 of the Code of Federal Regulations.
