For more than 90 years, researchers around the world have relied on the CRC Handbook of Chemistry and Physics for authoritative, up-to-date data. This year will be no exception. Many of the most heavily used tables in the book receive major updates and expansions, most notably: Physical Properties of Inorganic Compounds features nearly 25% more compounds; Bond Dissociation Energies includes 70% more compounds, including for the first time more than 1200 molecular ions; and Chemical Carcinogens was updated in accordance with the recent report from the National Toxicology Program. New references will also help keep readers up to date.