Assertion: caustic pencil | /r/HasProperty | device
Facets:
value: for applying topical medication
type: PURPOSE
Source sentences:
text: A caustic pencil (or silver nitrate stick) is a device for applying topical medication containing silver nitrate and potassium nitrate, used to chemically cauterize skin, providing hemostasis or permanently destroying unwanted tissue such as a wart, skin tag, aphthous ulcers, or over-production of granulation tissue.