Is it harmful to use Dettol disinfectant liquid (intended for laundry) to wash underwear?

Generally speaking, the "genital area" refers to the external genitalia. Using Dettol disinfectant—intended for laundry—to wash underwear can be harmful to the external genitalia and is not recommended. This type of disinfectant is highly irritating, and any residual components may disrupt the natural microbial balance of the genital area, leading to discomfort. It is advisable to use specialized intimate wear cleaning products instead. The detailed explanation is as follows:

Dettol disinfectant's main active ingredient is chloroxylenol, formulated specifically for clothing disinfection and significantly more irritating than cleansers designed for underwear. When washing underwear, if the disinfectant is not thoroughly rinsed out, residual chemicals may come into direct contact with the mucous membranes of the external genitalia, disrupting the protective barrier formed by beneficial bacteria such as lactobacilli in the vagina and reducing local immunity.

Once this protective barrier is compromised, the genital area may experience symptoms such as itching, redness, swelling, and abnormal discharge. This also increases the risk of developing gynecological inflammations, including bacterial vaginosis and fungal (yeast) infections. Individuals with sensitive constitutions are especially vulnerable—even minimal residue may trigger noticeable irritation and place additional strain on the body.

For daily underwear washing, it is best to use a mild, intimate-area-specific laundry detergent. These products are formulated with gentle ingredients and a pH level close to that of the human body, effectively cleaning while protecting genital health. After washing, ensure thorough rinsing and dry the underwear in direct sunlight to naturally kill bacteria, thus establishing healthy hygiene habits.