Copper sulfate (CuSO₄) doesn't have a well-defined melting point. It decomposes before reaching its melting point.

Here's a breakdown:

* Decomposition: When heated, copper sulfate decomposes into copper oxide (CuO) and sulfur trioxide (SO₃). This decomposition occurs at a temperature around 650°C (1202°F).

* Boiling Point: Due to decomposition, there isn't a true boiling point for copper sulfate.

Important Note: The specific temperature at which decomposition occurs can vary slightly depending on the conditions, such as pressure.

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