U.S. Producer Price IndexMeasures the average change over time in the selling prices received by domestic producers for their output. The prices included in the PPI are from the first commercial transaction for many products and some services.
National Minerals Information CenterStatistics and information on the worldwide supply of, demand for, and flow of minerals and materials essential to the U.S. economy, the national security, and protection of the environment.
ICIS Academic LinkThis provides downloads for students and academics. This includes historical chemical prices.
The ICIS Global Petrochemical Index (IPEX) provides a capacity-weighted measure of the average change in petrochemical prices over time.