Portuguese to English Medical Medical: Health Care riscos ocupacionais

This term, and "não-fibrogênicos", are in a table of occupational risks, issued by the Brazilian Ministry of Labour, in the "Risks" column. From the other lines in the table, "fibrogênicos" provoke pulmonary fibrosis, so presumably they are the particles that provoke this condition. What are they called in English?

And, logically, "não-fibrogênicos" may be particles that are a risk but do not provoke pulmonary fibrosis. What are they in English?

They both look like adjectives, in which case the substantive is omitted. Is it "particles"?

Thanks in advance!