Property data

Contains registry number, chemical name, molecular formula, structure, physical and toxicological properties plus locator and classification data.

Numerical data thermodynamic and physical properties.

This classic and well-known reference was originally published from 1926 - 1930 for the National Research Council in 7 volumes. It contains an enormous amount of critical data on inorganic and organic compounds, and pure substances. Featuring physical, thermodynamic, mechanical, and other key properties, it is a major reference source used by those involved in chemistry, physics, and engineering.

Contains physical constants, atomic spectroscopy data, molecular spectroscopic data, atomic and molecular data, x-ray and gamma-ray data, radiation dosimetry data, nuclear physics data, condensed matter physics data and more.

Data on constants and related precision measurements provided by the NIST Physics Laboratory.

Contains chemical structures, names, and physical properties for over 41,000 chemicals.

Thermochemical and thermophysical data for chemical compounds and other substances.

Provides access to databases on toxicology, hazardous chemicals, environmental health, and toxic releases.

Periodic Table of the elements providing chemical property information. A click on any element leads users to comprehensive data information about that element.