Congo red
Congo red
Congo red (/ˈkɒŋɡoʊ rɛd/) is a synthetic dye that is often used in laboratories for staining. It is the sodium salt of 3,3'-([1,1'-biphenyl]-4,4'-diyl)bis(4-aminonaphthalene-1-sulfonic acid). Its formula is C32H22N6Na2O6S2.
Etymology
The name "Congo red" comes from the Congo River in Africa, where the dye was first used. The term "red" refers to the color of the dye.
Usage
Congo red is used in the textile industry as a dye for cotton. In the medical field, it is used in the Amyloid staining process due to its ability to bind to amyloid protein. It is also used in the creation of Congo red paper, which is used to test for the presence of free Hydrochloric acid in gastric juices.
Related Terms
- Amyloid: A type of protein that can build up in your tissues and organs.
- Hydrochloric acid: A strong, corrosive acid that is commonly used in laboratory work.
- Congo red paper: A type of paper that changes color when it comes into contact with an acid or a base.
Health Risks
Exposure to Congo red can cause irritation to the skin, eyes, and respiratory tract. It is also considered a potential carcinogen.
External links
- Medical encyclopedia article on Congo red
- Wikipedia's article - Congo red
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