Effects: ANEMIA, LEUKEMIA, THROMBOCYTOPENIA, BONE MARROW DEPRESSION: in a form of BONE MARROW APLASIA & PANCYTOPENIA (dose-dependent to cause bone marrow aplasia pancytopenia). DERIVED FROM PETROLEUM; used in the synthesis of other chemicals; USED AS ANTINAC AGENT in unleaded gasoline, usually inhibit pre-ignition or nap of cars;