EXPERIMENTAL OBSERVATION ON GERMICIDAL EFFICACY OF COMPOUND CHLORING-CONTAINING DISINFECTANT

Objective:To know the germicidal efficacy and corrosiveness of compound chloring-containing disinfectant.Method:carrier quantitative germicidal test and metal corrosive test were carried out.Results:The killing rates of the follows were 100%:spores of Bacillus subtilis var.niger on cloth strip exposed to the disinfectant solution containing available chlorine 2000 mg/L for 20 min,Staphylococcus aureus and Escherichia coli on cloth strips exposed to the solution containing avaiable chlorine 30 mg/L for 10 min and 3 min respectively and Candida albicans exposed to the solution containing avaiable chlorine 20 mg/L for 10 min.The disinfectant solution containing available chlorine 1 500 mg/L with a 30 min contact time could destroy the antigenicity of HBsAg on stainless steel coupon.The disinfectant solution containing available chlorine 2 000 mg/L was not corrosive to stainless steel,slightly corrosive to aluminum and copper and moderately corrosive to carbon steel.Conclusion:compound chloring-containing disinfectant has highly effective Germicidal action and is corrosive to metals.