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8C H A P T E R 4 This report records the development and successful vali- dation of a new procedure for measuring the rate of gas pro- duction when a water-reactive substance evolving either a flammable gas or a toxic gas is combined with water. The test is fully defined, is reproducible, and should be suitable for uniform implementation across multiple laboratories. The test relies upon a simple and easily cali- brated method for measuring the gas produced (change in pressure within a closed vessel) and takes into account the possibility that some gases may dissolve in water during testing. Any next steps or further work primarily relates to inter- lab testing of the method to establish that comparable results can be achieved in independent laboratories. To the extent desired by stakeholders, testing of candidate materials for classification may also be commissioned. Conclusions and Suggested Research
