This microfiche is computer generated in 56 grid format from the magnetic tape file which is derived from the OHM/TADS (Oil and Hazardous Materials/Technical Assistance Data System) component of the NIH/EPA CIS (Chemical Information System). OHM/TADS contains an extensive amount of data for over 1,000 chemicals which have been designated as oils or hazardous materials, and was developed by the Office of Water and Waste Management of the U.S. EPA (Environmental Protection Agency). While the primary function is to provide emergency information to spill response team personnel, it also serves as a general source of diverse information on hazardous substances. The entire information for the OHM/TADS component is included on this microfiche, which includes two indexes - Material Name and Registry. In the file, each separate chemical is headed by a record indicating an entry number (this is simply a sequential counter) and the OHM/TADS accession number for the chemical. This line is followed by the individual data fields associated with the chemical. For each chemical, data may be provided, as applicable and available, on any of 126 subjects (fields) into which all information in the data base has been categorized. The data for each such field is preceded by a parenthesized, three-character mnemonic.