Sterilizing Action of Acids. IV Report

Abstract

I studied the sterilizing action of unsaturated monobasic fatty acids on putrifactivc bacteria, Bac. typhosus and Vib. cholerae. Results are as follows. (1) At the same molecular concentration, acrylic acid (C3) and crotonic acid (C4) have nearly the same sterilizing power. But in detail, acrylic acid has the slightly stronger sterilizing power than crotonic acid. Undecylenic'acid (C11) is very slightly soluble in water, but its sterilizing action is very strong. (2) Anions of C3 and C4, acids have no sterilizing action. (3) Anions of C11 acid has strong sterilizing action. (4) At the same molecular concentration, unsaturated monobasic fatty acids have stronger sterilizing power than saturated manobasic fatty acids. This fact is distinct by C11 acid. (5) At the same pH of acids of C3 and C4, saturated monobasic fatty acids have stronger sterilizing power than unsaturated acids. (6) Molecular concentration and undissociated molecules of these acids have a considerable sterilizing power.