Used primarily in medical settings as a rapid-acting vasodilator to treat hypertensive emergencies. It works by relaxing blood vessels, allowing for immediate reduction in blood pressure. Administered intravenously under close monitoring due to its short duration of action and potential for cyanide toxicity with prolonged use. Also employed during surgery to induce controlled hypotension and reduce bleeding. In laboratory settings, it serves as a reagent for detecting certain amino acids like cysteine and for measuring ketone bodies in urine.