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Disposition of benzyl alcohol after topical application to human skin in vitro.

Authors
Saiyasombati-P; Kasting-GB
Source
J Pharm Sci 2003 Oct; 92(10):2128-2139
NIOSHTIC No.
20029239
Abstract
Dissipation of a volatile compound or mixture from the skin surface after topical application involves both diffusion and evaporation. This report presents a detailed test of a previously described first-order kinetic approach to modeling this problem. Modified Franz diffusion cells fitted with a vapor trap were used to obtain absorption and evaporation data for benzyl alcohol (1% solution in ethanol) after application to human skin in vitro. Airflow over the skin surface (upsilon) was controlled in the experiment and accounted for in the model by allowing the evaporation rate constant(s) to vary as a function of upsilon. A linear dependence was found over the working range of the system, 10-100 mL/min. Three kinetic models were developed, all of which satisfactorily correlated cumulative absorption and evaporation results over the full range of upsilon (n = 120, s = 4-5%, r2 = 0.98-0.99). One of these was the model presented previously, in which all dissipation occurs from a single skin compartment. However, more details of the evaporation and absorption profiles could be accounted for by means of two-compartment models that explicitly consider the surface film present in the early stages post-application. The latter models seem to be better candidates for describing the time evolution of the volatile mixture evolving from the skin surface after topical application of, e.g., a complex fragrance or perfume.
Keywords
Skin; In-vitro-studies; In-vitro-study; Skin-absorption; Mathematical-models; Models; Alcohols; Humans
Contact
Gerald B. Kasting, College of Pharmacy, The University of Cincinnati Medical Center, P.O. Box 670004, Cincinnati, Ohio 45267-0004, USA
CODEN
JPMSAE
Publication Date
20031001
Document Type
Journal Article
Email Address
gerald.kasting@uc.edu
Funding Type
Grant
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-007529
Issue of Publication
10
ISSN
0022-3549
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Journal of Pharmaceutical Sciences
State
OH
Performing Organization
University of Cincinnati
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