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

    Metadata Updated: September 30, 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 November 12, 2020
    Metadata Updated Date September 30, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from Commerce Non Spatial Data.json Harvest Source

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date September 30, 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/catalog.jsonld
    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 93094be7-94af-465f-91aa-185796a3d811
    Harvest Source Id bce99b55-29c1-47be-b214-b8e71e9180b1
    Harvest Source Title Commerce Non Spatial Data.json Harvest Source
    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 f097df11d43351421038c84ca4461b200bb989da22956167b709cc31f5e3e739
    Source Schema Version 1.1

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