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SRD Online Subscriptions

Thermodynamics Research Center

For over 70 years, TRC has produced a great number of periodical compilations and electronic databases that have become source data for scientific research and industrial process design. Subject areas include thermophysical properties and transport properties of pure compounds, binary mixtures, ternary mixtures, and chemical reactions, as well as properties for classes of materials representing particular needs in academia, industry, and government such as clathrate hydrates, and ionic liquids. The goals of TRC are to establish a comprehensive archive of experimental data of well-defined composition and be a comprehensive source of critically evaluated data.

The following SRD are available for individual use, or as a subscription for your entire organization.




Materials discovery and development necessarily begins with the preparation and identification of product phase(s).  Crystalline compounds can be identified by their characteristic diffraction patterns using X-rays, neutrons, and or electrons.  An estimated 20,000 X-ray diffractometers and a comparable number of electron microscopes are used daily in materials research and development laboratories for this purpose. Access to crystal structure data is a critical step in solving research and applications problems in materials researches, and these data are of interest to analysts in areas such as materials design, property prediction and compound identification.  Read More

Individual 1 user
Small Institution 2 to 10 users   
Large Institution unlimited users 

SRD 202

NIST/TRC Web Thermo Tables (WTT) - Lite
This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. These data were generated through dynamic data analysis, as implemented in the NIST ThermoData Engine software package. As of November, 2010, WTT - Lite Edition contains information on 150 commonly-used compounds and access to a total of 86407 evaluated experimental data points.  Read More
NIST Web Thermo Tables, Version Lite - Small Institution (2 to 500 users)
NIST Web Thermo Tables, Version Lite - Medium Institution (501 to 2000 users)
NISTWeb Thermo Tables, Version Lite - Large Institution (2001+ users)

SRD 203

NIST/TRC Web Thermo Tables (WTT) - Professional Edition
WTT - Professional Edition contains information on 23399 compounds and access to a total of 512538 evaluated experimental data points. This product also provides critically evaluated data for some non-molecular species such as radicals and organic salts carried from the TRC Thermodynamic Tables published from 1942-2009.  Read More
NIST Web Thermo Tables, Version Professional - Small Institution (2 to 500 users)
NIST Web Thermo Tables, Version Professional - Medium Institution (501 to 2000 users)
NIST Web Thermo Tables, Version Professional - Large Institution (2001+ users) 



Created March 11, 2011, Updated November 13, 2019