Vanadyl perchlorate or vanadyl triperchlorate is a golden yellow coloured liquid or crystalline compound of vanadium, oxygen and perchlorate group.

The substance consists of molecules covalently bound and is quite volatile; it ignites organic solvents on contact and explodes at temperatures above 80 °C.

[1] Vanadyl perchlorate can be made by reacting vanadium pentoxide with dichlorine heptoxide at 5 °C.

It is purified by distillation under a vacuum and recrystallisation at 21 °C.

[5][6] Vanadic perchlorate, also known as vanadium(III) perchlorate solution in water, is a green-tinged blue colour, significantly different to most other V(III) solutions, which are complexed.