alexa The percutaneous absorption of hydroquinone (HQ) through rat and human skin in vitro.
Dermatology

Dermatology

Journal of Pigmentary Disorders

Author(s): Barber ED, Hill T, Schum DB

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Abstract Because of the potential for human contact with photographic developer solutions containing hydroquinone (HQ), the rates of percutaneous absorption of HQ through human stratum corneum and full-thickness rat skin have been measured in vitro using 5\% aqueous solutions of HQ as the donor solutions. The studies were performed using infinite doses of aqueous solutions containing 14C-labeled HQ in Franz-type diffusion cells. The measured absorption rate (mean +/- S.D.) of HQ through human stratum corneum was 0.52 +/- 0.13 micrograms/cm2/h, while that for full-thickness rat skin was 1.1 +/- 0.65 micrograms/cm2/h. The ratio (rat/human) of the permeability constants (Kp) was 2.4. Using the definitions suggested by Marzulli et al. (1969) Toxicol. Appl. Pharmacol. Suppl. 3, 76-83, HQ would be classified as 'slow' with respect to its absorption through human stratum corneum.
This article was published in Toxicol Lett and referenced in Journal of Pigmentary Disorders

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