Here is a great, free site that allows you to get information using a variety of data entry methods (by CAS, by name, etc.): http://www.chemfinder.com/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Kim Mihalik Environmental Engineer SAIC MS R-4-3 11251 Roger Bacon Dr. Reston VA 20190-5232 ph: 703/318-4594 fax: 703/736-0826