Curious info. I figured that the use of PAX was effectively grandfathered in as suitable for use by IATSE Makeup artists on SAG actors. But I'm a total amateur.
Regardless of how the professional industry works, Liquitex colors are generally considered safe because they bare the "AP" (Approved Product) seal from the Arts & Crafts Materials Institute, indicating that it has been certified in a toxicological evaluation by a medical expert to contain no materials in sufficient quantities to be toxic or injurious to humans, including children, or to cause acute or chronic health problems. And that it is labeled in accordance with the chronic hazard labeling standard, ASTM D 4236, and the U. S. Labeling of Hazardous Art Materials Act. (More Info
The major difference between these regulations and the Food Drug & Cosmetics (FD&C) regulations is that the latter requires a complete listing of ingredients. If you want approved cosmetics, the prefabricated body paints sold as PAX may fall under that category, but I haven't investigated to be sure.