It is a yellow solid that is an example of a comparatively insoluble potassium salt.

The salt features the hexachloroplatinate(IV) dianion, which has octahedral coordination geometry.

The precipitation of this compound from solutions of hexachloroplatinic acid was formerly used for the determination of potassium by gravimetric analysis.

[6] Reduction of potassium hexachloroplatinate with hydrazine dihydrochloride gives the corresponding tetrachloroplatinate salt.

"Symptoms range from irritation of skin and mucous membranes to life-threatening attacks of asthma.