Abstract
The potential derivatives of sorbic acid (2,4-hexadienoic acid) from our previous study were subjected to preservative efficacy testing. Aluminium Hydroxide Gel – USP was used as a pharmaceutical product and Staphylococcus aureus MTCC 2901, Bacillus subtilis MTCC 2063, Escherichia coli MTCC 1652, Candida albicans MTCC 227 and Aspergillus niger MTCC 8189 were used as representative challenging microorganisms for antimicrobial effectiveness testing as per USP 2004. The hexadienoic acid derivative, m-nitrosorbanilide has better preservative efficacy than sorbic acid as well as the standard preservatives, methyl paraben and propyl paraben.