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Melting point / freezing point

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There are no data available for the melting/freezing point of hydroxylammonium nitrate. However, read across data for bis(hydroxylammonium)sulphate and hydroxylamine were available. Hydroxylamine has a melting point of 33°C and hydroxylammonium sulphate decomposes at temperatures above 120°C (above 130°C explosion is likely). It is likely that hydroxylammonium nitrate will display similar melting/freezing point characteristics as hydroxylamine and decompose above 120°C.