Stoffmonografie für Di-2-propylheptylphthalat (DPHP) - Human-Biomonitoring (HBM)-Werte für die Summe der Metaboliten Oxo-Monopropylheptylphthalat (oxo-MPHP) und Hydroxy-Monopropylheptylphthalat (OH-MPHP) im Urin von Erwachsenen und Kindern

Abstract

1,2-benzenedicarboxylic acid, bis(2-propylheptyl)ester (bis(2-propylheptyl)phthalate, DPHP) is used as plasticizer for the manufacture of plastics, i.e. mainly polyvinylchloride (PVC). A subchronic feeding study with rats revealed a NOAEL (no observed adverse effect level) of 40 mg/(kg bw?ı?d), which can be used as a point of departure (POD) for the derivation of an HBM-I value. Application of a total assessment factor of 200 leads to an estimation of 200 Ţg/kg bw as a tolerable daily intake of DPHP. On the basis of the results of metabolism studies with humans it is possible to calculate from the tolerable daily intake of DPHP to the tolerable concentration of specific metabolites in urine. Thus an HBM-I value of 1 mg/L morning urine for children and 1.5 mg/L morning urine for adults was derived for the sum of the oxidized monoesters oxo-MPHP and OH-MPHP, which were identified as robust and conclusive biomarkers for DPHP. Quelle: http://link.springer.com