ABSTRACT
IARC MONOGRAPH 35 JAN 85 THERE IS SUFFICIENT EVIDENCE FOR CARCINOGENICITY OF EXTRACTS OF STEAM-REFINED BITUMENS, AIR-REFINED BITUMENS AND POOLED MIXTURES OF STEAM-AND AIR-REFINED BITUMENS IN EXPERIMENTAL ANIMALS. ALSO LIMITED EVIDENCE FOR CARCINOGENICITY OF UNDILUTED STEAM-REFINED BITUMENS AND FOR CRACKING-RESIDUE BITUMENS IN ANIMALS; AND INADEQUATE EVIDENCE FOR CARCINOGENICITY OF UNDILUTED AIR-REFINED BITUMENS. IS REASONABLE, FOR PRACTICAL PURPOSES, TO REGARD THESE CHEMICALS AS IF THEY PRESENTED A CARCINOGENIC RISK TO HUMANS.
