Dey-Engley Neutralization Broth is used for the neutralization and control of antiseptics and disinfectants, and for the detection of microorganisms on surfaces of sanitary interest. Dey-Engley Neutralization Broth is particularly suitable for environmental sampling where neutralization of the chemical is important to determine its bactericidal activity. A highly bacteriostatic substance inhibits the growth and reproduction of bacteria without killing them. These bacteria have the ability to cause infection under favorable conditions. Dey Engley Neutralization Broth Base and DeyEngley Neutralization Broth have the same formula but the former does not contain the neutralizing components. Dey-Engley Neutralization Broth neutralizes a broad spectrum of antiseptics and disinfectants, including quaternary ammonium compounds, phenolic compounds, iodine and chlorine preparations, mercurials, formaldehyde and glutaraldehyde. DeyEngley Neutralization Broth is used for the neutralization and testing of antiseptics and disinfectants according to the Engley and Dey procedure.