title: Penetration of beta-naphthylamine and o-toluidine through human skin in vitro.
abstract: Several aromatic amines (AAs) are known to be carcinogens for humans. AAs are considered to be substantially absorbed through the skin. However, the database for dermal absorption of AAs in general is limited and no specific studies on dermal absorption of beta-naphthylamine (BNA) and o-toluidine (OT) have been published. In the present study using diffusion cells, we investigated dermal penetration of BNA and OT through human skin. We have demonstrated that both AAs penetrate through human skin fast (lag time: approximately 1.2 vs. 0.8 h) and in high percentages (54 vs. 50%, respectively, of the applied dose within 24 h). A skin notation is therefore justified for these substances.
authors.affiliation: Institute and Out-Patient Clinic of Occupational, Social and Environmental Medicine, University Erlangen-Nuremberg, Schillerstrasse 25/29, 91054 Erlangen, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Lüersen
authors.forename: Tanja
authors.initials: T
authors.lastname: Wellner
authors.forename: Holger M
authors.initials: HM
authors.lastname: Koch
authors.forename: Jürgen
authors.initials: J
authors.lastname: Angerer
authors.forename: Hans
authors.initials: H
authors.lastname: Drexler
authors.forename: Gintautas
authors.initials: G
authors.lastname: Korinth
mesh_terms: D015081:2-Naphthylamine / Q000378:metabolism*; D000328:Adult; D002274:Carcinogens, Environmental / Q000378:metabolism*; D015194:Diffusion Chambers, Culture; D005260:Female; D006801:Humans; D007700:Kinetics; D008875:Middle Aged; D009924:Organ Culture Techniques; D018570:Risk Assessment; D012867:Skin / Q000378:metabolism*; D012869:Skin Absorption; D013997:Time Factors; D014052:Toluidines / Q000378:metabolism*
chemical_list: D002274:Carcinogens, Environmental; D014052:Toluidines; C023622:2-toluidine; D015081:2-Naphthylamine