Benz[a]acridine was considered by previous IARC Working Groups in 1983 and 1987 (IARC, 1983, 1987). Since that time, new data have become available; these have been incorporated into the Monograph, and taken into consideration in the present evaluation. Benz[c]acridine was considered by previous Working Groups in 1972, 1983, and 1987 (IARC, 1973a, 1983, 1987). Since that time, new data have bec...