The melting and boiling points of ammonium metatungstate can be summarized as follows:
What is the melting point of ammonium metatungstate?
The melting point of ammonium metatungstate is 100°C (dec.) (literature value). However, because ammonium metatungstate undergoes multiple phase changes and decomposition processes when heated, the term “melting point” may not be entirely accurate when describing ammonium metatungstate. In practical applications, what is more often concerned is its thermal decomposition behavior at different temperatures.
What is the boiling point of ammonium metatungstate?
The boiling point of ammonium metatungstate is 338.519°C at 760 mmHg. Since ammonium metatungstate decomposes at high temperatures, it is difficult to reach its true boiling point in practice.
In summary, ammonium metatungstate begins to thermally decompose at around 100°C, and will begin to decompose significantly before the theoretical boiling point of 338.519°C (760 mmHg). Therefore, when handling and storing ammonium metatungstate, special attention should be paid to avoiding high-temperature environments to prevent it from decomposing or triggering other chemical reactions.
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