1, 2-Benzenedicarboxylic acid, di-C9-11-branched and linear alkyl esters. Acts as a plasticizer. It is produced by esterifying C9-C11 mixed alcohol and phthalic anhyrdide. It exhibits low volatility, durable mechanical characteristics and excellent cold resistance. Used in wires & cables, clothes, leathers (coat), car spring cushion, gloves, shoes, construction materials and PVC plastisols.