Chemistry Guide

The National Institute of Standards and Technology (NIST) provides thermochemical, thermophysical, and ion energetics data compiled under the Standard Reference Data Program.

Reviews free internet sources of significant physical property information.

Comprehensive free source of material property, listing over 99,000 materials. Search for Physical Properties, Alloy Composition, Material Type, Manufacturer, Trade Name and Metal UNS number.
Includes links to converters and calculators.
Web's database is comprised primarily of data sheets and spec sheets supplied by manufacturers and distributors.

"Free site organized by National Institute of Advanced Industrial Science and Technology (AIST), Japan."

"WebThermoTables is a web application that delivers the most-up-to-date critically evaluated thermodynamic data, providing a web interface to data from ThermoData Engine."