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Guidance on dermal absorption

Buist, Harrie; Craig, Peter; Dewhurst, Ian; Hougaard Bennekou, Susanne; Kneuer, Carsten; Machera, Kyriaki; Pieper, Christina; Court Marques, Daniele; Guillot, Gilles; Ruffo, Federica; Chiusolo, Arianna

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Harrie Buist

Ian Dewhurst

Susanne Hougaard Bennekou

Carsten Kneuer

Kyriaki Machera

Christina Pieper

Daniele Court Marques

Gilles Guillot

Federica Ruffo

Arianna Chiusolo


This guidance on the assessment of dermal absorption has been developed to assist notifiers, users of test facilities and Member State authorities on critical aspects related to the setting of dermal absorption values to be used in risk assessments of active substances in Plant Protection Products (PPPs). It is based on the ‘scientific opinion on the science behind the revision of the guidance document on dermal absorption’ issued in 2011 by the EFSA Panel on Plant Protection Products and their Residues (PPR). The guidance refers to the EFSA PPR opinion in many instances. In addition, the first version of this guidance, issued in 2012 by the EFSA PPR Panel, has been revised in 2017 on the basis of new available data on human in vitro dermal absorption for PPPs and wherever clarifications were needed. Basic details of experimental design, available in the respective test guidelines and accompanying guidance for the conduct of studies, have not been addressed but recommendations specific to performing and interpreting dermal absorption studies with PPPs are given. Issues discussed include a brief description of the skin and its properties affecting dermal absorption. To facilitate use of the guidance, flow charts are included. Guidance is also provided, for example, when there are no data on dermal absorption for the product under evaluation. Elements for a tiered approach are presented including use of default values, data on closely related products, in vitro studies with human skin (regarded to provide the best estimate), data from experimental animals (rats) in vitro and in vivo, and the so called ‘triple pack’ approach. Various elements of study design and reporting that reduce experimental variation and aid consistent interpretation are presented. A proposal for reporting data for assessment reports is also provided. The issue of nanoparticles in PPPs is not addressed. Data from volunteer studies have not been discussed since their use is not allowed in EU for risk assessment of PPPs.


Buist, H., Craig, P., Dewhurst, I., Hougaard Bennekou, S., Kneuer, C., Machera, K., …Chiusolo, A. (2017). Guidance on dermal absorption. EFSA Journal, 15(6), Article e04873.

Journal Article Type Article
Acceptance Date May 24, 2017
Online Publication Date Jun 30, 2017
Publication Date Jun 30, 2017
Deposit Date Jul 3, 2017
Publicly Available Date Jul 4, 2017
Journal EFSA Journal
Print ISSN 1831-4732
Publisher Wiley Open Access
Peer Reviewed Peer Reviewed
Volume 15
Issue 6
Article Number e04873


Published Journal Article (7.4 Mb)

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Copyright Statement
© 2017 European Food Safety Authority. EFSA Journal published by John Wiley and Sons Ltd on behalf of European Food Safety Authority.

This is an open access article under the terms of the Creative Commons Attribution-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited and no modifications or adaptations are made.

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