The liquid in wet wipes is commonly referred to as the "liquid agent" or "medicated solution," with its primary component being water (typically purified or specially treated water).

Depending on the function of the wet wipes, the liquid may also include：

Humectants：Prevent rapid evaporation of moisture, maintain wetness, and form a moisturizing film on the skin surface after cleaning to prevent dryness.

Surfactants：Provide mild cleansing effects, helping to remove oil, dirt, and grease from the skin surface. Similar to the foaming cleansers in facial washes or shampoos but used in smaller amounts and with milder properties.

Emollients and Soothing Ingredients：Nourish and protect the skin while cleaning, reducing irritation caused by friction. These are particularly common in baby wipes and wipes for sensitive skin.

Special Functional Ingredients：

Alcohol：Typically effective at concentrations between 55% and 70% for sterilization.

Benzalkonium Chloride：A common quaternary ammonium disinfectant, gentler than alcohol.

Sodium Hypochlorite：The diluted active component of bleach (e.g., 84 disinfectant), primarily used for surface disinfection and highly irritating.