Cetylpyridinium Chloride (CPC) is a quaternary ammonium compound and cationic surfactant that appears as a white to off-white crystalline powder. It offers broad-spectrum antimicrobial activity against bacteria, fungi, and enveloped viruses. Highly soluble in both water and ethanol, CPC is widely used in personal care formulations—particularly in oral care products such as mouthwashes and throat lozenges for anti-plaque and anti-gingivitis benefits. It also serves as an effective preservative and antibacterial agent in cosmetics, pharmaceuticals, and disinfectants.