When you need the reagent data for a chemical or a definition for a Chemical term, use a reference source.
Sources to look up:
The library doesn't like promoting sources that have advertisements or can benefit monetarily from the information they give you, but these two sources are an exception. They are trustworthy for these reasons:
This resource is a well known book that is published every year. The online resource isn't very easy to use, but you might want to learn to use it in case a future employer wants you to use it.