著者

政本 幸三

出版者

THE SOCIETY OF COSMETIC CHEMISTS OF JAPAN

雑誌

日本化粧品技術者連合会会誌 (ISSN:18846572)

巻号頁・発行日

vol.8, no.2, pp.32-39, 1974-01-15 (Released:2010-08-06)

参考文献数

10

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1. Seventeen strains of gram-negative bacteria were isolated from commercial shampoos, hair rinses, skin creams, skin lotions, hair conditioners and tooth-pastes. They were resistant against popular commercial preservatives such as carbanilide, salicylanilide and bis-phenol. Some of the isolated bacteria had the ability to oxidize raw materials commonly formulated in a shampoo or lotion, while they had the ability to utilize succharide and liquefy gelatin.The type of bacteria appeared in the product seemed to be determined by the product components, its formulation and manufacturing process.2. Bactericidal activity of several preservatives against the isolated bacteria was determined with the practical aging test in the model shampoo and lotion. In the lotion, sorbic acid was effective.The combination of p-hyproxymethyl benzoate and sorbic acid, or of p-hydroxymethyl benzoate, p-hydroxybutyl benzoate and benzoic acid was effective in the shampoo. β-bromocinnamic aldehyde and cinnamic aldehyde were also effective in the shampoo.It is suggested that the antimicrobial activity of preservatives used in cosmetic products is influenced by various factors such as pH, type of emulsifer and micellar solubilization.