title: Toxic Chemicals in the Workplace: A Manager's Guide to Recognition, Evaluation, and Control
author: T. M. Fraser  M.D.
description: In easy-to-understand language, here are the steps to controlling exposure (potential and actual) to toxic materials placed wittingly - or unwittingly - in the work environment. This guide examines industrial toxicology in a manner that you can immediately put to use. Here is authoritative, practical information with every unusual term defined, every scientific concept explained. Engaging and informative case studies, based on actual experiences, reveal the dramatic aspects of chemical problems and how they were solved. Managers, and anyone charged with health and safety, such as human resources managers, occupational health nurses, and industrial hygienists will find answers in this book.
zlib_text: KNOWN TO BE A HUMAN CARCINOGEN
  TENTH REPORT ON CARCINOGENS
  BENZIDINE AND 
  DYES METABOLIZED TO BENZIDINE 
  INTRODUCTION
  Benzidine was listed in the First Annual Report on Carcinogens (RoC) in 1980.  Dyes
  metabolized to Benzidine (Benzidine Dyes Class) were listed in the Ninth Edition of the RoC in
  2000.  Two representative dyes of this class, Direct Black 38 and Direct Blue 6, were originally
  listed in the Third Annual RoC in 1983 as reasonably anticipated to be human carcinogens, and
  then changed to known to be human carcinogens in the Ninth Edition in 2000. 
  The profile for dyes metabolized to benzidine supercedes the previous listing of individual
  benzidine dyes (specifically Direct Black 38 and Direct Blue 6) and applies to all dyes that are
  metabolized to benzidine. The listings for benzidine and dyes metabolized to benzidine in the
  Tenth Edition of the RoC are as follows:
  Benzidine is known to be a human carcinogen based on sufficient evidence of
  carcinogenicity in humans (IARC 198