Ans: Merbromin is one of the most commonly used antiseptics. It is used as an antiseptic for the prevention of infection arising due to small cuts, abrasions and scrapes. It is commonly marketed as mercurochrome because of its colour and staining properties as well. It was one of the first in a series of chemical compounds to utilise mercury as a disinfectant as it renders a microorganism ineffective by disrupting the metabolism of a microorganism. It is so commonly used that it is also used to treat schoolyard injuries.