Pesticides and other agricultural chemicals are in use in virtually every country in the world. It is therefore useful and important to those involved with these chemicals to have a collection of data concerning the substances most commonly used for agricultural purposes. This Handbook includes data on over 1,800 substances, including a number of mixtures, which are important in agriculture. Almost all records describing pure chemicals carry the appropriate CAS Registry Number and the associated EINECS Number. All chemicals in this edition which also appear in the twelfth edition of the Merck Index have the Merck Index Number provided. Wherever possible, the following information is also provided for each entry: definitions, classifications, chemical composition, functions, applications, suppliers, melting point, boiling point, density or specific gravity, refractive index, optical rotation, ultraviolet absorption, solubility, and acute toxicity.