Often, people come on the boards with a CAS #, and a "what is it used for" question. This is unfortunately, working backwards, and it is hard for us to help. Ususally, you have an application in mind, and you're looking for a new reagent. A little Googling on the name may help, but it may not if you don't have specific technical training. Or there may be no info at all -- a CAS # means nothing, it just means that one was applied for, and was given out. It doesn't mean the chemical is common, or useful, or that the use is known, outside of a patented application.