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The REACH Regulation and the revision to the Aerosol Dispensers Directive (ADD) both require that all chemicals are used in aerosol in a way that does not adversely affect human health. The BAMA Indoor Air Model can be used to predict the concentration of aerosol components within a room after a suitable time interval after spraying.

The REACH Regulation and the revision to the Aerosol Dispensers Directive (ADD) both require that all chemicals are used in aerosol in a way that does not adversely affect human health. The BAMA Indoor Air Model is a simple but powerful tool, independently validated by experts from BRE who concluded that the Model 'can be used to predict the concentration of aerosol components within a room after a suitable time interval after spraying'. The Model gives a 'worse case' concentration for the spray where all of the material is available to be breathed in. The Model can be used to rapidly generate predicted concentrations for a wide range of use conditions for spray products. This guide provides advice, including generic examples for the data inputs on how to run the Model and use it for Chemical Safety Assessments (CSAs) that must be carried out in order to meet the requirements of REACH. The BAMA Indoor Air Model will help companies to model existing formulations and developers to screen new formulations at the laboratory stage. Guidance is provided for Inhalation and Systematic Exposure. Modelling these exposures gives a method for a safety assessment of a spray ingredient by direct comparison of predicted time weighted concentrations with the DNEL (derived no-effect level) developed by the supplier for the Registration of that chemical and reported on the Safety Data Sheet. The latter also allows the user to calculate a dose that is inhaled so that comparisons can be made with data on systemic toxicity if there are no suitable DNELs, or other toxicity data.