Being an indispensable reference book for occupational health and safety professionals, the book and the enclosed CD-ROM contain data for about 1000 chemical compounds, classifying them as carcinogens, germ cell mutagens, sensitizing substances, embryotoxicants or bearing a risk to pregnancy. Threshold limit values in air (MAK values) as well as for body fluids (BAT values) are given wherever tolerable concentrations can be defined. Also included are CAS-numbers, structural formulae, chemical synonyms, and relevant physico-chemical data.