[Cr(H2O)4Cl2]Cl•2H2O → [Cr(H2O)4Cl2]Cl + 2H2O
The thermal decomposition of dihydrate dichloridotetraaquachromium(III) chloride to produce dichloridotetraaquachromium(III) chloride and water. The reaction proceeds at room temperature, in vacuo, over concentrated sulfuric acid. This reaction takes place slowly.