This collection of data on more than 130 chemicals gives users the facts they need to recognize and describe potentially dangerous chemicals. Thorough and well-structured information is given on: - physiochemical data, - toxicological and ecotoxicological aspects, - threshhold values, - use and disposes of many industrial chemicals and herbicides. The systematic depiction of data enables comparisons among chemicals to be drawn. A General Section discusses the basis and procedure necessary to judge how dangerous the chemicals are. The most important legal regulations are listed and a glossary ensures that the user can easily understand the descriptions. In the Third Edition the data was updated and supplemented with information on ecotoxicology, expositions, environmental conduct and risk to the environment.