A sample of potassium tetrachloroiodide (better name: potassium tetrachloro iodate (III)), made by adding potassium iodate to concentrated hydrochloric acid, heating till all solid dissolves and then allowing to evaporate very slowly in a petri dish, while keeping the cap on the petri dish in the final stage of drying. This compound is unstable, when kept in air, but in a closed vial it can be stored indefinitely. In contact with air, it slowly looses ICl₃ and it turns into KCl.

Below follows a more detailed picture of the compound. Total amount is approximately 500 mg.