This standard specifies a test method and the minimum requirements for bactericidal activity of chemical disinfectant products that form a homogeneous, physically stable preparation when diluted with hard water – or in the case of ready-to-use products – with water. This standard applies to products that are used in the medical area for disinfecting instruments by immersion – even if they are not covered by the EEC/93/42 Directive on Medical Devices. This standard applies to areas and situations where disinfection is medically indicated. Such indications occur in patient care, for example: - in hospitals, in community medical facilities and in dental institutions; - in clinics of schools, of kindergardens and of nursing homes; - and may occur in the workplace and in the home. It may also include services such as laundries and kitchens supplying products directly for the patients. NOTE – This method corresponds to a phase 2, step 2 test (see Annex E)."