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    • NIST Web Thermo Tables (WTT) - Professional Edition - SRD 203

    Metadata Updated: July 9, 2025

    The Web Thermo Tables (WTT) are 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. Also included are some critically evaluated data from the historical TRC Thermodynamic Tables archive. The Professional Edition contains information on over 28,000 compounds. For a subset of the data focused on commonly-used pure compounds please see the Lite Edition (http://www.nist.gov/srd/nistwebsub2.cfm) .

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    http://wtt-pro.nist.gov/wtt-pro/help/toc.html

    Dates

    Metadata Created Date March 11, 2021
    Metadata Updated Date July 9, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from NIST

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 11, 2021
    Metadata Updated Date July 9, 2025
    Publisher National Institute of Standards and Technology
    Maintainer
    Identifier EBC9DB05EDF45B0EE043065706812DF811
    Language en
    Data Last Modified 2012-05-01 00:00:00
    Rights Access to WTT - Professional Edition is subscription-based.For more information please visit http://www.nist.gov/srd/nistwebsub3.cfm
    Category Standards:Reference data
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 006:55
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 5f4caa1a-f4ff-488c-88be-723b8bd04256
    Harvest Source Id 74e175d9-66b3-4323-ac98-e2a90eeb93c0
    Harvest Source Title NIST
    Homepage URL https://www.nist.gov/srd/nist-standard-reference-database-203-web-thermo-tables-wtt-professional-edition
    License https://www.nist.gov/open/license
    Program Code 006:052
    Related Documents http://wtt-pro.nist.gov/wtt-pro/help/toc.html
    Source Datajson Identifier True
    Source Hash 6c6d64928814ac9dbebd4e37c3e7ae4d887963b7a93b7612cf20b3786ab3f787
    Source Schema Version 1.1

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