CAS 9003-55-8 appears in our catalog under these names: POLYSTYRENE–B–POLYBUTADIENE–B–POLYSTYRENE, Poly(styrene/butadiene) 22:78, POLY(STYRENE-CO-BUTADIENE), MELT INDEX 6, POLYSTYRENE-BLOCK-POLYBUTADIENE-BLOCK-P&. Offered by: GLPBio, Biosynth, Sigma-Aldrich. Available pack sizes: 500g, 0,5kg, 0,25kg, 1kg, 5kg, 250G.