Chemical Data (CDI). provides ongoing market research and analysis for the U.S. plastics, petrochemical and petroleum industries. Our services include two monthly multi-client studies that cover most everything from crude oil and natural gas to plastics. We also provide other services including custom single-client studies. Our clients span the globe and include investment, energy, oil, chemical, and consumer product companies. Our clients also include a number of plastics convertors and plastics consumers, both large and small.