Ill. Admin. Code tit. 35 § 219.110

Current through Register Vol. 48, No. 49, December 6, 2024

Section 219.110 - Vapor Pressure of Organic Material or Solvent

a) If the organic material or solvent consists of only a single compound, the vapor pressure must be determined by ASTM Method D2879-86 (incorporated by reference in Section 219.112 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) Except as provided in subsection (d), 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 must be determined by the following equation:

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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);

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 only of organic material compounds, the vapor pressure must be determined by ASTM Method D2879-86 (incorporated by reference in Section 219.112) or by the above equation.

d) For hand-wipe cleaning solvents used at aerospace facilities subject to Section 219.219(g)(2), the composite vapor pressure of a cleaning solvent consisting of multiple components must be determined by the following equation:

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where:

PP_c	=	Composite vapor pressure of the cleaning solvent in mmHg at 20 °C;

n	=	Number of components in the cleaning solvent;

i	=	Subscript denoting an individual VOM-containing component;

j	=	Subscript denoting an individual non-VOM component;

W_i	=	Weight of a VOM-containing component in grams;

W_j	=	Weight of a non-VOM component in grams;

W_w	=	Weight of water in grams;

MW_i	=	Molecular weight a VOM-containing component in grams per gram-mole;

MW_j	=	Molecular weight of a non-VOM component in grams per gram-mole

MW_w	=	Molecular weight of water in grams per gram-mole;

VP_i	=	Vapor pressure of a VOM-containing component in mmHg at 20 °C.

Ill. Admin. Code tit. 35, § 219.110

Amended at 20 Ill. Reg. 14462, effective October 28, 1996

Amended at 45 Ill. Reg. 3553, effective 3/4/2021