On May 7, 2012, U.S. EPA announced its 2012 Integrated Risk Information System ("IRIS") agenda which adds seven new chemicals to the IRIS program while withdrawing four chemicals from the program. The new IRIS chemicals are chlorobenzene, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, element mercury, methyl mercury, vanadium, and 1,2,3-trimethylbenzene. The four withdrawn chemicals are alkylates, bisphenol A, mirex and refractory ceramic fibers. There are now a total of 51 chemicals on the IRIS evaluation list. U.S. EPA intends to have have initiated the assessment process for all 51 chemicals by fiscal 2014. Click here to go to U.S. EPA's IRIS website.