| http://www.w3.org/ns/prov#value | - If, after removing the water of solution by evaporation, if necessary in vacuo, the salt is melted under normal pressure at 110???-115??? C., and care is taken by passing an inert gas, for example nitrogen or carbon dioxide, over the material to ensure good distillation of the water of condensation, the temperature being raised to 128???-132??? C., it is possible to carry out the condensation reac
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