GFS Chemicals - Call 877-534-0795 or Order online. Analytical, Reagents, Organic, Inorganic and more, small bottle and bulk. Welcome! Get Purchasing Rights Search for Keywords In this part of the site: Entire Site MSDS catalog glossary tech library GFS Developing a Replacement for Hexavalent Chromium High Valence and Low Valence Metal Chemistries from GFS GFS Chemicals is expanding the In-spec product line Free New Organics Catalog Available from GFS Trade Shows Q . I have seen a number of Inquire items in the GFS catalog. What is the difference between an Inquire item and a custom synthesis?