Toluene diisocyanates are reasonably expected to become human carcinogens dependant on enough evidence of carcinogenicity from reports in experimental animals. The unexplained excesses in lung cancer and NMRD mortality while in the Pinkerton cohort [12] are concerning, and any publicity dependence appears to be afflicted by nutritious worker survivor bias. https://costabull.com/product/toluene-diisocyanate-tdi-80-20/