All disinfectants are tested to industry-standard EN methods, including for example EN 1276, which is the suspension test for establishing whether a chemical disinfectant has bactericidal activity. This test can however be performed in what is referred to as either ‘clean’ or ‘dirty’ conditions.
There is an important distinction between the two methods, as it is widely known that the presence of organic matter may reduce the activity of the disinfectant in-use.
The purpose of the ‘clean’ conditions method is to represent surfaces which have already been cleaned with a detergent formulation for example, resulting in minimal levels of organic material remaining on the surface. The dirty conditions method is to represent an area which has not been pre-cleaned, and is therefore more likely to contain higher-levels of organic material. This latter method is more relevant to products which claim to ‘clean and disinfect’, such as our Azo Universal range.
Please note that all of our Azo Universal testing has been conducted under dirty conditions, however this is not always the case with competitor brands.