The following is a description of each table. There are introductions at the beginning of the tables that provide table-specific information.
Table 1 is an alphabetical list of chemical substances, their Chemical Abstract Services Registry Numbers (CASRNs), and some physical constants. (Future reviews will result in continuous updates to this data.) There are columns that provide the date of the original derivation of the PAC values, the date of the last technical review of the data and/or the PAC values.
Table 2 is an alphabetical list of the chemical substances and their corresponding PAC values. Values are given in parts per million (ppm) for gases and volatile liquids and in milligrams per cubic meter (mg/m³) for solids, particulates (aerosols) and nonvolatile liquids.
Table 3 is a list of the same PAC values as presented in Table 2, but the chemicals are sorted by CASRNs. They are presented in either ppm or mg/m³.
Table 4 is an alphabetical list of the chemical substances and their corresponding PAC values in mg/m³. The conversion of ppm to mg/m³ was carried out assuming normal temperature and pressure, 25°C and 760 mm Hg.