For First Aid, Medical and Personal Hygiene Uses. Dettol Liquid is a proven safe and effective concentrated antiseptic disinfectant, that kills bacterial and provides expert protection against the germs which can cause infection and illness.Dettol Liquid can be used for gentle antiseptic wound cleansing and disinfection, antiseptic skin cleansing and as a disinfectant in and around the home. Trust Dettol to protect your family from germs.