Antibacterial Activity of 2-Hexyldecanoic Acid Potassium Salt and Application to Sanitizing Liquid Laundry Detergents

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  • 2-ヘキシルデカン酸カリウムの除菌活性と除菌液体洗濯洗剤への応用
  • 2-ヘキシルデカンサン カリウム ノ ジョキン カッセイ ト ジョキン エキタイ センタク センザイ エ ノ オウヨウ

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Abstract

As people are becoming increasingly aware of hygiene in their daily lives, laundry plays a pivotal role in removing stains from clothing. Laundry detergents with various functions are widely available on the market, and in recent years, demand for laundry detergents that can remove microbial contamination has increased. One of the reasons for this is the malodor that persists on laundered clothes. Common microorganisms involved in the generation of malodor include indigenous skin bacteria, such as Moraxella osloensis. These bacteria use perspiration on fibers and neutral lipids secreted by oil glands as the sources of nutrients to proliferate, resulting in the generation of malodor. As a solution to this problem, laundry detergents with high detergency and potent ability to remove microorganisms harmful to humans should be developed. In the present study, we focused on a branched fatty acid salt, 2-hexyldecanoic acid potassium salt (isoC16K), which has previously been proven effective against M. osloensis. The effectiveness of isoC16K was evaluated based on the antibacterial activity assay specified by Fair-Trade Council of Detergents and Soap. The strains evaluated in the assay were Escherichia coli and Staphylococcus aureus. At 0.4% concentration, isoC16K sterilized over 3 logs of viable bacteria of both strains. In addition, in the antibacterial activity assay against bacteria adhering to clothing worn by humans, 0.4% isoC16K eliminated over 3 logs of viable bacteria. Finally, in the analysis of the minimum concentration that meets the criteria for bactericidal activity against E. coli, 0.1% isoC16K could eliminate 2 logs of viable bacteria. Therefore, isoC16K may contribute to the development of novel sanitizing liquid laundry detergents.

Journal

  • Indoor Environment

    Indoor Environment 26 (1), 15-27, 2023

    Society of Indoor Environment, Japan

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