Chlorocresol Products | Cleanchem - Chlorocresol is an antimicrobial agent used as a preservative in medicines, vaccines, and cosmetics. It prevents the growth of bacteria, fungi, and other microorganisms, ensuring the sterility and safety of pharmaceutical products. Chlorocresol is also used in some topical treatments for minor cuts and abrasions. Potential side effects include skin irritation or allergic reactions in some individuals.