In 1998, the City of Vienna initiated the Eco-buy procurement program to align the entire procurement of the city with ecological criteria. To this end, more than two dozen working groups have been set up to create minimum criteria and selection tools. The Vienna Ombud’s Office for Environmental Protection, in the person of Marion Jaros, took over the management of the Disinfection Working Group, which also includes toxicologists as well as representatives of the AUVA (Austrian Workers’ Compensation Board), the hygiene teams of the Vienna Health Association, industry and NGOs. The working group was and is engaged in continuously improving the disinfectant database. After legal questions regarding liability had been resolved, it was decided in the City of Vienna to make the database from October 2009 accessible free of charge to all interested parties on the Internet [1]. The Bureau for Chemical Engineering TB-Klade advises the working group from the very beginning and significantly contributed to the elaboration of the assessment concept. The WIDES assessment is based on the precautionary principle by enabling product comparisons and a substitution testing in the sense of an integrated work and environmental protection. It is most comparable to occupational health and safety assessment models and is not in competition with risk assessment in the context of active substance and product approvals. The aim of the evaluation is to compare products with identical application. For example, products for hand disinfection, wiping surface disinfection or manual instrument disinfection are compared with each other. The currently valid version of the WIDES substance and product review can be found on the WIDES webpage [1] or can be downloaded here: