DIPPR Projects | AIChE

DIPPR Projects

DIPPR manages multiple projects, including the Project 801 Database, which recognized as the world's premier source of critically evaluated thermo-physical properties.

Current Projects

Project 801

DIPPR’s flagship project supports a number of discrete initiatives targeted at expanding the breadth of the 801 Database to compounds of interest to the chemical processing industries, continuously improving the quality of the data contained in the 801 Database based on the most current world-wide research in the field, and, uniquely, refining our proprietary predictive methods used to estimate properties in the absence of reliable data employing our validated data as training-sets. See project 801 details.

Project 801EXP

This Project is guided by the DIPPR GOLD STANDARD evaluation methodology which provides valuable insights into what missing data could add significant value to improving the quality of the 801 Database. Recent work has focused on:

  • Generating reliable experiment data to improve DIPPR’s correlating equation for liquid viscosity (LVS); a parallel project is looking into molecular modeling of LVS.
  • Improving agreement between experimental data and predicted values for LCP, ICP, HVP and VP for associating fluids.
  • Auto-ignition temperature measurements for developing an understanding of some anomalous behavior of n-alkanes

Project 801 QC

Making DIPPR’s 801 Database the GOLD STANDARD in its field by providing end-users with the most accurate recommended values and temperature-dependent correlations available and a complete set of properties for each chemical in the database. This annual effort ensures that all data in the 801 Database is scrutinized for “Currency” (most up-to-date reliable data are used) and “Accuracy” (recommended values and temperature correlations are based on a critical, comprehensive evaluation by experts of the available data including inter-property relationships, inter-chemical relationships, and predicted/expected values).

Project 801E

This Project is currently focused on adding Henry’s Law constants with water, water solubility, and infinite dilution activity coefficients in water for compound already in the 801 database. The project is a continuation of extensive ESP work conducted under another earlier DIPPR Project – see Project ESP below

If you are looking for more information on the 801 Database, please use the DIPPR Contact Form to start a conversation.

Earlier Projects Supporting the 801 Database


Prior to 2015 DIPPR supported the two experimental programs summarized below and the valuable data generated have been added to the 801 Database. All experimental work supporting the 801 Database is now undertaken by Project 801EXP described above.

Project 805

An experimental project directed at obtaining phase equilibria and other data on systems of important industrial chemicals. Systems studied were selected to augment predictive techniques such as UNIFAC (UNIQUAC Functional-group Activity Coefficients) or the group contribution method ASOG (Analytical Solution of Groups), which estimate phase equilibria from data based on the molecular group structure of each component. Learn more.

Project 851

Experimental measurement of the critical point (temperature, pressure, density, and volume) of pure compounds with a focus on industrially important compounds for which reliable data were lacking. Since many such compounds are unstable at their critical temperature new rapid methods of measurement were required. Learn more.

Data Compilation and Evaluation

Project ESP

The DIPPR Environmental and Safety Properties (ESP) Database is based on over 40 cumulative years of DIPPR data work at Penn State University, Brigham Young University, and Michigan Technological University and remains unique in its ability to fill the knowledge gaps experienced by U.S. industry for ESP data. Learn more.

  • See Environmental and Safety Properties studied in DIPPR ESP along with a brief description of each property and the standard units used to report the property.
  • See a Matrix of Chemicals and Properties