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Washing-up liquid


Dishwashing liquid (BrE: washing-up liquid), known as dishwashing soap, dish detergent and dish soap, is a detergent used to assist in dishwashing. It is usually a highly-foaming mixture of surfactants with low skin irritation, and is primarily used for hand washing of glasses, plates, cutlery, and cooking utensils in a sink or bowl. In addition to its primary use, dishwashing liquid also has various informal applications, such as for creating bubbles, clothes washing and cleaning oil-affected birds.

Washing soda (sodium carbonate) is used for dishwashing, and may be used in areas with hard water. It was used for dishwashing before detergents were invented in Germany during World War I. Liquid detergent used for dishwashing was first manufactured in the middle of the 20th century. Dishwashing detergent producers started production in the United States in the 1930–1940s. Teepol, the first such in Europe, commenced production in 1942.

In 2005, dishwashing detergent retail sales totaled nearly USD $10 billion worldwide.

Dishwashing detergents for dishwashers are manufactured and marketed variously as cartridges, gel, liquids, pacs, powder, and tablets. Any dishwashing liquid may contain bleach, enzymes, or rinsing aids. Some dishwashing detergents may be homemade, using ingredients such as borax, essential oil, eucalyptus oil and grated bar soap, among others.

The main ingredient is water; the main active ingredients are detergents. There are other thickening and stabilizing agents. Other ingredients may include surfactants, hydrotrope, salts, preservatives, fragrances, and dyes.

Surfactants remove grease and stuck food particles. They may also provide foam.

Some dishwashing products contain phosphates in detergent. Phosphate makes dishes cleaner but can also cause harmful algal bloom as the wastewater goes back to the natural environment. Because of this, it is banned as a component in many places.


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