It is a dark-coloured crystalline solid which melts at 194° C. and boils at 268° C. It fumes in moist air and deliquesces gradually.
It deliquesces in moist air.
Heated in a closed tube at 180° C. it loses chlorine and leaves a black residue of trichromyl chloride, Cr 3 0 6 C1 2, which deliquesces on exposure to air.
Thorium chloride readily deliquesces on exposure and forms double salts with alkaline chlorides.
The solid must be at once bottled, because it attracts the moisture and carbonic acid of the air with great avidity and deliquesces.