If "mercurous chloride," "calomel," "mercuric," "mercurio" or "mercury" is listed on the label, stop using the product immediately.

It is formed by the action of a solution of mercurous nitrate, containing some nitrous acid, on alcohol.

It is manufactured by heating a mixture of mercurous sulphate and common salt in iron retorts, and condensing the sublimed calomel in brick chambers.