https://www.avient.com/products/polymer-colorants/solid-color-masterbatches/remafin-ep-white-colorants
The colorant solutions are available in PP and PE (HDPE and LDPE) and produced with ingredients tested to European Pharmacopeia 3.1.3 and 3.1.5 as well as to USP chapters , including class VI (a requirement for ophthalmic and nasal drugs) and USP and (light transmission).