Science

The most comprehensive resource for chemistry and related disciplines. Produced by the American Chemical Society. 1907+ Scifinder tutorials and guides
Scifinder system requirements for broswers and Java

An excellent source for experimentally validated reactions and substance data. The synthesis planner assists with the evaluation of alternative synthetic methods for the preparation of compounds and allows chemists to identify and combine selected reaction steps. Incorporates Beilstein & Gmelin. Reaxys tutorials and guides

A collection of electronic reference works including the Combined Chemical Dictionary, the Dictionary of Organic Compounds, the Dictionary of Inorganic and Organometallic Compounds, the Dictionary of Natural Products, and the CRC Handbook of Chemistry and Physics. Each title is searched separately.

Provides access to numerical and graphical data on the properties of materials
from the Landolt-Börnstein New Series, the Linus Pauling Files and other integrated resources.

An expert spectral data systemm containing over 2 million MS, NMR, and IR spectra - the broadest and largest collection in the world.