Originally published to provide quick and portable access to the most frequently needed information in the original bestselling CRC Handbook of Toxicology, this new pocketbook is designed to serve the same purpose for the recently revised and expanded Handbook. It continues to provide the most frequently used toxicological reference material in a convenient pocket-sized format. Several sections have been expanded to offer important new information and meet current and emerging areas of concern. A great number of new tables have been added and a few less useful ones eliminated. It also includes a much more timely and reformatted glossary.