Antimicrobial activity of some salts of dialkylthiophosphoric acids.

A total of 18 derivatives of O,O-dialkylthio- and O,O-dialkyldithiophosphoric acids were tested for antimicrobial activity using strains ofStaphylococcus aureus, Bacillus subtilis, Escherichia coli andCandida albicans. The activity was found to depend on the length of the alkyl substituent and/or the cation size. All derivatives were ineffective withE. coli andC. albicans.