Includes bibliographical references (pages 1255-1336) and index.

New data in this third edition includes bioconcentration factors, aquatic mammalian toxicity values, degradation rates, corresponding half lives in various environmental compartments, ionization potentials, aqueous solubility of miscellaneous compounds, and biological, chemical and theoretical oxygen demand values for various organic compounds. The following data fields have been added to each chemical profile - sources of contamination, entropy of fusion, and Merck reference citation. New tables include quantitative and qualitative nature of various petroleum fuels, Henry's law constants, soil adsorption constants, and toxicity data for a wide variety of chemicals. Profiled compounds include solvents, herbicides, insecticides, fumigants, and other hazardous substances most commonly found in the groundwater environment.