This report concerns decontamination of victims of chemical casualties. In order to arrive at an optimised decontamination of persons, a thorough analysis of how important parameters will influence the decontamination process and the efficiency of decontamination is needed. Important parameters are the time in which decontamination can be carried out before the contaminating chemical adversely affects an individual. The means how decontamination has to be carried out is crucial to secure that the contaminant is removed and/or destroyed as quickly and efficiently as possible. In the project physical-chemical (influence decontamination methodology) and toxicological (affects the individual) properties of chemicals have been compiled and analysed. In addition, an analysis of actual serious incidents with hazardous substances has been carried out as well as an evaluation of the state of the art in the field of decontamination from national and international perspectives. A diversified decontamination strategy based on a division of chemicals into groups with similar properties could not be formulated. Decontamination in order to stop an exposure is never a wrong measure. After exposure to a gas it is in most cases sufficient to leave the area and undress. After contamination with an aerosol or liquid, a more thorough decontamination is necessary, including disrobing, wiping away or scraping away of liquid and, if possible, rinsing with large amounts of water (tempered if possible). This decontamination should be carried out as soon after the contamination as possible. It should also minimise secondary contamination of transport vehicles, the surrounding and first responders. If very toxic compounds are responsible for the contamination, it is highly important that adequate, medical countermeasures should be administered as quickly as possible. The highest degree of decontamination efficiency can only be reached at the decon stations found at many of the main hospitals in Sweden. In addition, these are the facilities with the best resources for medical treatment. Contaminated people showing symptoms of systemic effects should therefore be transported to such hospitals as soon as possible.