<unk>  In the United States,<unk> s are classified and regulated as cosmetics by the U.S. Food and Drug Administration (FDA) and are designed to eliminate odor.<unk> s are often alcohol based. Alcohol initially stimulates sweating but may also temporarily kill bacteria. Other active ingredients in<unk> s include sodium stearate, sodium chloride, and stearyl alcohol.<unk> s can be formulated with other, more persistent antimicrobials such as triclosan that slow bacterial growth or with metal chelant compounds such as EDTA.<unk> s may contain perfume fragrances or natural essential oils intended to mask the odor of perspiration. In the past,<unk> s included chemicals such as zinc oxide, acids, ammonium chloride, sodium bicarbonate, and formaldehyde, but some of these ingredients were messy, irritating to the skin, or even carcinogenic. Over-the-counter products, often labeled as "natural<unk>  crystal", contain the chemical rock crystals potassium alum or ammonium alum, which prevents bacterial action on sweat. These have gained popularity as an alternative health product, in spite of concerns about possible risks related to aluminum (see below – all alum salts contain aluminum in the form of aluminum sulphate salts) and contact dermatitis. Vaginal<unk> , in the form of sprays, suppositories, and wipes, is often used by women to mask vaginal secretions. Vaginal<unk> s can sometimes cause dermatitis.<unk>  antiperspirant Methenamine-based antiperspirant for treatment of excessive sweating In the United States,<unk> s combined with antiperspirant agents are classified as drugs by the FDA. Antiperspirants attempt to stop or significantly reduce perspiration and thus reduce the moist climate in which bacteria thrive. Aluminium chloride, aluminium chlorohydrate, and aluminium-zirconium compounds, most notably aluminium zirconium tetrachlorohydrex gly and aluminium zirconium trichlorohydrex gly, are frequently used in antiperspirants. Aluminium chlorohydrate and aluminium-zirconium tetrachlorohydrate gly are the most frequent active ingredients in commercial antiperspirants. Aluminium-based complexes react with the electrolytes in the sweat to form a gel plug in the duct of the sweat gland. The plugs prevent the gland from excreting liquid and are removed over time by the natural sloughing of the skin. The metal salts work in another way to prevent sweat from reaching the surface of the skin: the aluminium salts interact with the keratin fibrils in the sweat ducts and form a physical plug that prevents sweat from reaching the skin’s surface. Aluminium salts also have a slight astringent effect on the pores; causing them to contract, further preventing sweat from reaching the surface of the skin. The blockage of a large number of sweat glands reduces the amount of sweat produced in the underarms, though this may vary from person to person. Methenamine in the form of cream or spray is effective in the treatment of excessive sweating and attendant odor. Antiperspirants are usually best applied before bed.
Deodorant
Antiseptic
Fungicide
Dermal adhesive
Insect repellent
Prebiotic 
Moisturizer
Surgical lubricant