Accession Number : AD1049398

Title :   Vapor Pressure Data and Analysis for Selected Organophosphorus Compounds, CMMP, DPMP, DMEP, and DEEP: Extrapolation of High-Temperature Data

Descriptive Note : Technical Report,01 Mar 2015,31 May 2017


Personal Author(s) : Brozena,Ann ; Abercrombie-Thomas,Patrice L ; Tevault,David

Full Text :

Report Date : 01 Apr 2018

Pagination or Media Count : 40

Abstract : Experimental investigations from our laboratory continue to focus on the measurement of selected physical properties of chemical warfare agents (CWAs) and their surrogates, precursors, and degradation products. This report documents vapor pressure data and correlations for four phosphonate ester compounds that have molecular structures similar to those of CWAs. As a result, these materials may be considered to be CWA surrogates and can be used to evaluate the performance of defensive equipment, which requires accurate knowledge of the thermophysical properties of agents and their surrogates. These data were measured using an ASTM International (West Conshohocken, PA) method that is based on differential scanning calorimetry. The data presented herein were used to determine temperature pressure correlations, and the fit constants were used to calculate temperature-dependent thermodynamic properties to enable the interpolation and limited extrapolation of the data. No ambient-temperature vapor pressure data are available for any of the title compounds, and a method is recommended herein to obtain the best estimates of vapor pressure in the ambient temperature range when data are not available.

Descriptors :   ORGANOPHOSPHORUS COMPOUNDS , vapor pressure , VOLATILITY , high temperature , phosphonates , esters , CHEMICAL WARFARE AGENTS

Subject Categories : Organic Chemistry
      Chemical, Biological and Radiological Warfare

Distribution Statement : APPROVED FOR PUBLIC RELEASE