Home Display Materials Polyimide (PI) material 4-Aminobenzoic acid 4-aminophenyl ester (APAB) 4-Aminobenzoic acid 4-aminophenyl ester (APAB) CAS: 20610-77-9 Category: Polyimide (PI) material Related products 3,3′,5,5′-Tetramethylbenzidine (TMB)CAS: 54827-17-7 Polyimide (PI) material p-PhenylenediaMine(p-PDA)CAS: 106-50-3 Polyimide (PI) material Nadic Anhydride (NA)CAS: 826-62-0 Polyimide (PI) material 4,4′-Oxydiphthalic anhydrideCAS: 1823-59-2 Polyimide (PI) material