The NIST Chemistry WebBook provides access to data compiled and distributed by NIST under the Standard Reference Data Program.

The NIST Chemistry WebBook contains:

  • Thermochemical data for over 7000 organic and small inorganic compounds:
    • Enthalpy of formation
    • Enthalpy of combustion
    • Heat capacity
    • Entropy
    • Phase transition enthalpies and temperatures
    • Vapor pressure
  • Reaction thermochemistry data for over 8000 reactions.
    • Enthalpy of reaction
    • Free energy of reaction
  • IR spectra for over 16,000 compounds.
  • Mass spectra for over 15,000 compounds.
  • UV/Vis spectra for over 1600 compounds.