Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • NIST Hydrocarbon Spectral Database - SRD 115

    Metadata Updated: September 30, 2025

    This database contains the rotational spectral lines observed and reported in the open literature for 91 hydrocarbon molecules through September 1987. The isotopic molecular species, assigned quantum numbers, observed frequency, estimated measurement uncertainty and reference are given for each transition reported. In addition to correcting a number of misprints and errors in the literature cited, the spectral lines for many normal isotopic species have been refit to produce a comprehensive and consistent analysis of all the data extracted from various literature sources. The derived molecular properties, such as rotational and centrifugal distortion constants, hyperfine structure constants, electric dipole moments, and rotational g-factors are listed.

    Access & Use Information

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

    Downloads & Resources

    References

    http://physics.nist.gov/PhysRefData/MolSpec/Hydro/Html/intro.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 FDB59097466A5200E043065706813E54114
    Language en
    Data Last Modified 2004-07-01 00:00:00
    Category Atomic / molecular / quantum, Standards:Reference data, Chemistry:Analytical chemistry
    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 0d0b9a69-d644-4d25-9b8d-f3d279159cca
    Harvest Source Id bce99b55-29c1-47be-b214-b8e71e9180b1
    Harvest Source Title Commerce Non Spatial Data.json Harvest Source
    Homepage URL https://www.nist.gov/pml/hydrocarbon-spectral-database
    License https://www.nist.gov/open/license
    Program Code 006:052
    Related Documents http://physics.nist.gov/PhysRefData/MolSpec/Hydro/Html/intro.html
    Source Datajson Identifier True
    Source Hash 2a0da33ac7d9427a8dcfefd14a087cf1fb6ab0905bbc28fd215fc34fa6bfa93b
    Source Schema Version 1.1

    Didn't find what you're looking for? Suggest a dataset here.