A: Access to on-line chemical and physical data on the environmental fate of toxic substances can be found at the following web sites.

• ThermoDex -- This database contains records for over 120 printed handbooks and compilations of thermodynamic and thermophysical data for chemical compounds and other substances. ThermoDex is a product of the Mallet Chemistry Library at the University of Texas at Austin.
  
• Environmental Fate Data Base (EFDB) -- The EFDB gives rapid access to all available environmental fate data on a given chemical. The EFDB is comprised of several interrelated files--DATALOG, CHEMFATE, BIOLOG, and BIODEG. The database is sponsored by the U.S. Environmental Protection Agency.
  
• The University of Minnesota Biocatalysis/Biodegradation Database, The database contains information on microbial reactions and biodegradation pathways for a large collection of chemical compounds

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