NIST Chemistry WebBook

The NIST Chemistry WebBook contains: Thermochemical data for over 7000 organic and small inorganic compounds; Reaction thermochemistry data for over 8000 reactions; IR spectra for over 16,000 compounds; Mass spectra for over 15,000 compounds; UV/Vis spectra for over 1600 compounds; Electronic and vibrational spectra for over 4500 compounds; Constants of diatomic molecules (spectroscopic data) for over 600 compounds; Ion energetics data for over 16,000 compounds: Thermophysical property data for 34 fluids. You can search for data on specific compounds in the Chemistry WebBook based on name, chemical formula, CAS registry number, molecular weight, chemical structure, or selected ion energetics and spectral properties.