Cross-contamination by disinfectant towelettes varies by product chemistry and strain

Table 1 Active ingredients and contact times for disinfectant wipes tested in this study

Disinfectant product ^a	Disinfectant Active Ingredient(s)^b,c	Active level at use^d	Label contact time (mins)^f
HP1	1.4% hydrogen peroxide	1.4%	1
HP2	0.5% hydrogen peroxide	0.5%	1
HP3	0.5% hydrogen peroxide	0.5%	1
QA1	0.25% n-alkyl (68%C₁₂, 32%C₁₄) dimethylethylbenzyl ammonium chloride 0.25% n-alkyl (60% C₁₄, 30% C₁₆, 5% C₁₂, 5% C₁₈) dimethyl benzyl ammonium chloride 55% isopropanol	0.5% + 55% ^e	2
QA2	0.76% didecyldimethyl ammonium chloride 15% isopropanol 7.50% ethanol	0.76% + 22.5%^e	1
QA3	0.233% disobutylphenolxyethoxyethyl dimethyl benzyl ammonium chloride 14.3% isopropanol	0.233% + 14.3% ^e	2

^aAbbreviated naming scheme reflects aggregated active ingredients for commercially available EPA registered disinfectants used in this study;
^bActive ingredient concentration;
^cDilution at use, ready-to-use;
^dActive ingredients concentration;
^eTotal quaternary ammonium plus alcohol content;
^fDefined label contact time

ISSN: 2047-2994