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Laundry detergent or washing powder is a type of cleaning agent (detergent), which is added to clean clothes. Although detergent is still sold as a powder, liquid detergents have occupied a large market share in many countries since their introduction in the 1950s.

Laundry detergent pods are also sold in the United States since 2012 when they were were introduced by Procter & Gamble as Tide Pods. Earlier cases of laundry detergent pods include Salvo tablets sold in the 1960s and 1970s.

Washing Powder

Detergent is a surfactant or mixture of surfactants with cleaning properties in dilute solutions. These substances are typically alkylbenzene sulfonates, a family of compounds that are similar to soap, but more soluble in hard water, since polar sulfonate (detergents) is less likely than polar carboxylate (of soap) to binds to calcium and other ions found in hard water.

In most households, the term detergent by itself refers specifically to laundry detergent or dish detergent, as opposed to hand soap or other cleaning agents. Detergents are usually available in the form of powders or concentrated solutions. Detergents, such as soaps, work because they are amphiphilic: partly hydrophilic (polar) and partly hydrophobic (non-polar). Their dual nature makes it easier to mix hydrophobic compounds (such as oil and grease) with water. Since the air is not hydrophilic, detergents also have different foaming properties.

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