Soap

In chemistry, soap is a salt of a fatty acid. Consumers mainly use soaps as surfactants for washing, bathing, and cleaning, but they are also used in textile spinning and are important components of lubricants.

Soaps for cleansing are obtained by treating vegetable or animal oils and fats with a strongly alkaline solution. Fats and oils are composed of triglycerides; three molecules of fatty acids attach to a single molecule of glycerol. The alkaline solution, which is often called lye (although the term "lye soap" refers almost exclusively to soaps made with sodium hydroxide), brings about a chemical reaction known as saponification.

In this reaction, the triglyceride fats first hydrolyze into free fatty acids, and then these combine with the alkali to form crude soap: an amalgam of various soap salts, excess fat or alkali, water, and liberated glycerol (glycerin). The glycerin, a useful by-product, can remain in the soap product as a softening agent, or be isolated for other uses.

Soaps are key components of most lubricating greases, which are usually emulsions of calcium soap or lithium soap and mineral oil. These calcium- and lithium-based greases are widely used. Many other metallic soaps are also useful, including those of aluminium, sodium, and mixtures of them. Such soaps are also used as thickeners to increase the viscosity of oils. In ancient times, lubricating greases were made by the addition of lime to olive oil.

Soap (Melanie Martinez song)

"Soap" is a song by Melanie Martinez, featured on her debut studio album, Cry Baby. The song was released July 10, 2015, along with a music video the same day. It is set to impact Alternative radio outlets according to Warner Music.

Background and compostion

"Soap" was premiered exclusively on ELLE magazine's website on July 10, 2015. The electropop,indie pop and bubblegum pop track was released as the second single from Melanie's debut album, "Cry Baby".

In the interview with ELLE, Melanie described the song, "Soap was written about my current boyfriend when we were first talking, I felt too scared to say how I felt about him and thought if I told him it'd be like throwing a toaster in his bath. So I washed my mouth out with soap. I think anyone can really relate to this song. I'm sure there was a time in everyone's life where they felt too scared to say how they felt so they 'washed their mouth out with soap'". She continued, "Everyone is allowed to be vulnerable. I think women and men and dogs and cats and ants and aliens can all express themselves and be vulnerable".

Soap (disambiguation)

Soap is a surfactant cleaning compound used for personal or other cleaning.

Soap may also refer to: