Germicidal Efficacy of Phthalaldehyde Disinfectant: An Experimental Study / 中华医院感染学杂志

ABSTRACT

OBJECTIVE To evaluate the germicidal efficacy of phthalaldehyde disinfectant.METHODS Suspension quantitative bactericidal test was used to observe its bactericidal efficacy and stability.RESULTS The temperature was 20-21℃.The results showed that the average killing rates of Escherichia coli,Staphylococcus aureus and Candida albicans exposed to the solution containing 5 664mg/L phthalaldehyde for 1 min were 99.99%,and the(average) killing rates of spores of Bacillus subtilis var.niger exposed to the solution containing 5 664mg/L(phthalaldehyde) for 60 min and 90 min was 99.94% and 100%,respectively.When its stock solution was stored at 56℃ under airtight condition for 2 weeks,the content of phthalaldehyde decreased by 3.27%.CONCLUSIONS The phthalaldehyde disinfectant is a good and stable bactericide.