CAS 9011-13-6 appears in our catalog under these names: Maleic anhydride-styrene copolymer Mw 7500, acid value: 330.0-370.0 mg KOH/g, Maleic anhydride-styrene copolymer, Mw 7500, acid value: 330.0-370.0 mg KOH/g. Offered by: Ambeed, BLDpharm. Available pack sizes: 1000g, 25g, 100g, 500g, 1kg.