Vapor Pressure of Organic Material or Solvent

Section 218 Section 218.110  Vapor Pressure of Organic Material or Solvent a)         If the organic material or solvent consists of only a single compound, the vapor pressure shall be determined by ASTM Method D2879-86 (incorporated by reference in Section 218.112 of this Part) or the vapor pressure may be obtained from a publication such as:  Boublik, T., V. Fried and E. Hala, "The Vapor Pressure of Pure Substances," Elsevier Scientific Publishing Co., New York (1973); Perry's Chemical Engineer's Handbook, McGraw-Hill Book Company (1984); CRC Handbook of Chemistry and Physics, Chemical Rubber Publishing Company (1986-87); and Lange's Handbook of Chemistry, John A. Dean, editor, McGraw-Hill Book Company (1985). b)         If the organic material or solvent is in a mixture made up of both organic material compounds and compounds which are not organic material, the vapor pressure shall be determined by the following equation: where: P om = Total vapor pressure of the portion of the mixture which is composed of organic material; n = Number of organic material components in the mixture; i = Subscript denoting an individual component; P i = Vapor pressure of an organic material component determined in accordance with subsection (a) of this Section; X i = Mole fraction of the organic material component of the total organic mixture. c)        If the organic material or solvent is in a mixture made up of only organic material compounds, the vapor pressure shall be determined by ASTM Method D2879-86 (incorporated by reference in Section 218.112 of this Part) or by the above equation.