<prompt> The cancerogenic chemical that has a very long latent period is -BenzopyrineVinyl chlorideAsbestosEstrogens  <response>: Asbestos exposure for a long period causes asbestosis. They entire the body through inhalation and are deposited in the alveoli. The long exposure of dust can lead to carcinoma of bronchus. REF. PARK;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 748 