High-level disinfectants (e.g., glutaraldehyde, peracetic acid, hydrogen peroxide) are regulated exclusively by the FDA and are labeled with FDA registration numbers.1 They inactivate all vegetative bacteria, mycobacteria, viruses, fungi, and with extended exposure times they are capable of killing high numbers, but not all, bacterial spores. These chemicals are highly toxic, and their use is limited for applications indicated in their label instructions (i.e., as immersion chemicals for the treatment of heat-sensitive medical instruments).1 The use of high-level disinfectants on environmental surfaces is inappropriate.1,2