chloride in an equimolar concentration and possibly unreacted sodium chlorite and or unreacted chlorine gas fig2 shows the stability of solutions of pure chlorine dioxide at about 3000 ppmw in pure water at various temperatures even at 40 u00b0 c the solution retains about 90 or more of its starting concentration for more than 90 days this is considered commercially acceptable fig3 shows the concentration of pure chlorine dioxide in amber glass bottles as a function of time and temperature at different low levels of contamination with sodium chloride nacl these studies show that these chlorine dioxide solutions retain about 90 or more of their starting concentration for at least about 90 days except for the sample with 100 ppmw concentration of nacl fig4 shows the effect of salt at concentrations in a range that would comprise concentrations that would be produced if the solution had been prepared in a solution based generator for example a generator where reaction 1 is carried out in solution these studies demonstrate that salt substantially increases the rate of chlorine dioxide decomposition in solution and the resulting solutions do not retain the target concentration of 90 starting concentration for at least 90 days permeation of chlorine dioxide through the walls of a container occurs with many forms of container materials common plastics such as polyethylene polypropylene and polycarbonate are known to be permeable to chlorine dioxide if solutions are packaged in containers of these materials the concentration of the chlorine dioxide will slowly decrease as it diffuses into and through the walls of the container this process can be substantially eliminated by selection of the appropriate.