1,2-Benzenedicarboxylic acid, monobutyl ester 131-70-4 4-09-00-03175 (Beilstein Handbook Reference) 5423-38-1 AI3-01768 BRN 2051402 Butyl hydrogen phthalate EINECS 205-036-2 MBP MONOBUTYL PHTHALATE Mono-n-butyl phthalate NSC 8479 Phthalic acid, monobutyl ester