STUDY ON SCREENING OF FORMULA OF HYDROGEN PEROXIDE FOAM DISINFECTANT

Modified Warring Blender test and disinfectant screening test were used to study the foam emulsifier and foam stabilizer of foamtype hydrogen peroxide disinfectant.Results: The disinfectant containing dodecyl dimethyl benzyl ammonium chloride 48 g/L produced most abundant foam(P0.05) and that containing arabic gum 3 g/L was most stable and its half life attained 31 min(P0.05).Orthogonal design was used to optimize the formula and following results were obtained by statistical treatment: the hydrogen peroxide foam disinfectant containing 50.7 g/L hydrogen peroxide,48 g/L dodecyl dimethyl benzyl ammonium chloride and 3 g/L arabic gum as the main ingredients with a 60 min contact time killed 99.94% of spores of Bacillus subtilis var.niger in suspension.After the disinfectant was stored at 54℃ for 14 d,its hydrogen peroxide content decreased by 3.35%.Conclusion: The disinfectant containing hydrogen peroxide,dodecyl dimethyl benzyl ammonium chloride and arabic gum has good foam-forming efficacy with high germicidal ability and is stable.