SciFindern is a search tool with which the databases of the Chemical Abstracts Service, CAS for short, can be searched.
These databases provide the most comprehensive source of references, substances and reactions in chemistry and related sciences.
Since the beginning of this year SciFinder offers a completely revised and improved search interface in the version with the small superscript "n".
You can also use SciFinder from home:
Detailed instructions for the use of SciFinder.