Protactinium(IV) chloride is an inorganic compound.

It is an actinide halide, a salt composed of protactinium and chlorine.

Protactinium(IV) chloride can be prepared by the reduction of protactinium(V) chloride:[2] It can also be obtained by the chlorination of protactinium(IV) oxide:[2] It can also be formed during the thermal decomposition of protactinium oxychloride at 500 °C in a vacuum:[3] Protactinium(IV) chloride is a chartreuse, hygroscopic, crystalline solid that can be sublimed at 400 °C in a vacuum.

It is soluble in strong mineral acids, forming green solutions.

141) and the lattice parameters a = 837.7 pm, c = 747.9 pm[2] of the uranium(IV) chloride type.