Using a clear and consistent format, this fourth edition contains more than 1,700 additional references and additional adsorption data for more than 800 organic compounds and metals, Henry's Law constants for 1,850 compounds, aqueous solubility data for over 2,500 compounds, toxicity data for 1,100 compounds, more than 31,000 synonyms, and 2,224 degradation products cross-referenced to parent compounds. Additional organic and inorganic solubilities, conversion factors, octanol-water partition coefficients, environmental fate data, analytical test methods, dielectric properties of various materials and liquids, and other tables and indexes have been added along with references for numerous physical parameters.