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PubMed1984

Histological changes in rabbits after application of medicaments and cosmetic bases (III).

An experimental study is reported of the irritant potential of oil of purcellin , isopropyl palmitate, nonyl phenol, Modulan , Amerchol and Acetulan when massaged in fixed amounts into the rabbit's skin daily for 30 days. Skin biopsies provided data on the number of epithelial cell layers, cell counts of the superficial dermis, and the fibre and basement membrane changes. All the test compounds induced changes in the form of increased number of epithelial cell layers and of the papillary dermis cell count, more marked for Acetulan or Amerchol . The difficulties in the evaluation of the results and their applications to human pathology are discussed.

Animals↗
PubMed1984

Allergic contact dermatitis from stearamidoethyl diethylamine phosphate: a cosmetic emulsifier.

Contact dermatitis to the emulsifier stearamidoethyl diethylamine phosphate was demonstrated in 4 patients. In 3 patients, the emulsifier was present in a commonly used over-the-counter dry skin lotion and in the 4th in a deodorant. In 2 cases, the patients overtly suspected that the product was the cause of the dermatitis. Patch tests to the products were positive. The emulsifier was identified as the contact allergen after testing with coded deletion and/or individual ingredient samples provided by the manufacturer. No apparent cross reactions were found from testing with the standard screening tray of the North American Contact Dermatitis Group or in one case to 2 structurally similar emulsifiers. No other positive reactions to the emulsifier were found after testing it routinely in one patch test clinic for 1 year. Repeated insult (prophetic) patch testing with the final formulation of the dry skin lotion (as performed by the manufacturer) was negative for sensitization and irritation.

Adult↗