When the solution is filtered, cooled and evaporated under a vacuum blue crystals form.

[6] In 1902, A. Meusser investigated solubility of copper chlorate and found that it melted and started decomposing above 73 °C, giving off chlorine.

[9] Sulfur is highly reactive with copper chlorate, and it is important not to cross contaminate these chemicals, for example in pyrotechnic making.

At 298 K (25 °C), the chlorine-oxygen distances in each chlorate ion are 1.498, 1.488 and 1.468 Å, with the longest being the oxygen next to copper.

[4] François-Marie Chertier used tetraamminecopper(II) chlorate to colour flames blue in 1843.