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A detergent is a surfactant or a mixture of surfactants having "cleaning properties in dilute solutions." In common usage, "detergent" refers to alkylbenzenesulfonates, a family of compounds that are similar to soap but are less affected by hard water. In most household contexts, the term detergent by itself refers specifically to laundry detergent or dish detergent, as opposed to hand soap or other types of cleaning agents. Detergents are commonly available as powders or concentrated solutions.
Detergents are classified into three broad groupings, depending on the electrical charge of the surfactants.
Anionic detergents
Typical anionic detergents are alkylbenzenesulfonates. The alkylbenzene portion of these anions is lipophilic and the sulfonate is hydrophilic. Two varieties have been popularized, those with branched alkyl groups and those with linear alkyl groups. The former were largely phased out in economically advanced societies because they are poorly biodegradable. An estimated 6 billion kilograms of anionic detergents are produced annually for domestic markets.
Cationic detergents
Cationic detergents are similar to the anionic ones, with a hydrophobic component, but instead of the anionic sulfonate group, the cationic surfactants have quaternary ammonium as the polar end. The ammonium center is positively charged.
Ethoxylates
Ethoxylates are compounds that have long hydrocarbon chains, but terminate with (OCH2CH2)nOH group. These groups are not charged, but they are highly hydrophilic owing to the presence of many oxygen centres.
Non-ionic (or zwitterionic) detergents
These are characterized by their (net) uncharged, hydrophilic headgroups. They are based on polyoxyethylene glycol (i.e., Tween, Triton, and Brij series), CHAPS, glycosides (i.e., octyl-thioglucoside, maltosides), bile acids such as DOC, lipids (HEGAs), or phosphine oxides. 

Cosmetics are substances used to enhance the appearance or odor of the human body. Cosmetics include skin-care creams, lotions, powders, perfumes, lipsticks, fingernail and toe nail polish, eye and facial makeup, permanent waves, colored contact lenses, hair colors, hair sprays and gels, deodorants, hand sanitizer, baby products, bath oils, bubble baths, bath salts, butters and many other types of products. A subset of cosmetics is called "make-up," which refers primarily to colored products intended to alter the user’s appearance. Many manufacturers distinguish between decorative cosmetics and care cosmetics. 

The manufacture of cosmetics is currently dominated by a small number of multinational corporations that originated in the early 20th century, but the distribution and sale of cosmetics is spread among a wide range of different businesses. The U.S. Food and Drug Administration (FDA) which regulates cosmetics in the United States defines cosmetics as: "intended to be applied to the human body for cleansing, beautifying, promoting attractiveness, or altering the appearance without affecting the body's structure or functions." This broad definition includes, as well, any material intended for use as a component of a cosmetic product. The FDA specifically excludes soap from this category.

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