The invention relates to liquid sanitizing and / or disinfecting compositions comprising an
active agent, an indicator compound, an acid, and a
solvent. The compositions may be applied to a surface by spraying or transferring from cleaning article, in order to eliminate pathogens on the surface. The indicator compound may comprise a dye such as a
cyanine dye, which provides a color to the composition and has at least one absorption maxima in the visible region. Once applied to the surface, the composition undergoes a
color transition and becomes colorless.