p-Dimethylaminoazobenzene. 4-Dimethylaminoazobenzene . Methyl Yellow . p-Dimethylaminoazobenzene, (E)-Isomer . p-Dimethylaminoazobenzene, (Z)-Isomer . 4 Dimethylaminoazobenzene . p Dimethylaminoazobenzene . Butter Yellow . Dimethylaminoazobenzene . DAB 18460 . A reagent used mainly to induce experimental liver cancer. According to the Fourth Annual Report on Carcinogens (NTP 85-002, p. 89) published in 1985, this compound "may reasonably be anticipated to be a carcinogen." (Merck, 11th ed) . 1.00