Di-n-pentyl phthalate

DnPeP; phthalic acid dipentyl ester; formula: C18H26O4; CAS Registry Number: 131-18-0
Structure of di-n-pentyl phthalate
Source: PubChem
Identifier: CID 8561
URL: https://pubchem.ncbi.nlm.nih.gov/compound/8561#section=2D-Structure

A phthalate, which might soon be subject to more severe regulation

Di-n-pentyl phthalate (DnPeP) is currently (2017) on the list of SVHC candidates (substances of very high concern) within the framework of European chemicals legislation. A classification as SVHC would lead to a stronger regulation of the substance.

The Environmental Specimen Bank does not analyses the parent substance DnPeP in human samples, but its main metabolite MnPeP.


  • MnPeP
    Mono-n-pentyl phthalate is a primary metabolite of DnPeP.


  • Student groups with an even number of female and male students at the age of 20 to 29.

Sampling area

Sampling period

2007 - 2015