The ASTM Standards is the primary source for standards or materials in the United States, covering almost any material of interest, from cloth to steel...

International Critical Tables offers data on physical, thermodynamic, mechanical, and other key properties and is a major reference source used by those involved in chemistry, physics, and engineering...

Knovel Critical Tables is a reference featuring tables of properties for commonly used chemical compounds in the physical properties tables...

Gateway to data collections on reaction data, thermochemical data, IR spectra, mass spectra, electronic and vibrational spectra, and ion energetics data...

Smithsonian Physical Tables contains 901 tables concentrating on a broad scope of common physical and chemical data, of general interest to physicists, chemists and other scientists...

Thermochemistry of the chemical substances...