CAS 2240998-88-1 appears in our catalog under these names: Poly((9,9-dihexylfluorenyl-2,7-diyl)-alt-(9,9'-spirobifluorene-2,7-diyl)), IEICO-4Cl , IEICO-4CL, >= 99 %. Offered by: Lumtec, Thermo Scientific (Alfa Aesar), Sigma-Aldrich. Available pack sizes: On request, 100mg, 250mg, 500mg.