we are looking for a supplier for long terms of the following byproduct of petrochemical industry CRUDE C5 PURCHASE SPECIFICATION Product Name: Crude C5 Item Unit Limits Isoprene wt% 18%min 1,3-pentadiene wt% 12%min Cyclopentadiene wt% 5%max Dicyclopentadiene wt% 10%min best regards Moeen