According to the article "YInMn Blue has been approved for US use in industrial coatings and plastics since September 2017", so saying that it has seen zero years of human use is not quite true.
As easy as it is to look at Trump's impact on the EPA and simply assume everything the EPA did during his tenure is de-facto bad. In this case, it would be useful to understand what specific impact his changes had on the EPA's ability to effectively evaluate the pigment against the Toxic Substances Control Act testing requirements mentioned in the article.
People clearly put a lot of work into this pigment, it'd be a shame to shun that only because they happened to apply for its use in consumer products while Trump was in office.
