Ehrlich's reagent
Ehrlich's Reagent
Ehrlich's reagent (pronounced: /ˈɛrlik/), also known as p-dimethylaminobenzaldehyde, is a chemical reagent named after its discoverer, Paul Ehrlich. The reagent is used primarily in the identification of indoles and urobilinogen.
Etymology
The reagent is named after Paul Ehrlich, a German physician and scientist who made significant contributions to the fields of hematology, immunology, and chemotherapy. Ehrlich's work in dye chemistry was particularly influential, leading to the development of this reagent.
Usage
Ehrlich's reagent is used in the Ehrlich's test, a simple and rapid colorimetric method to identify the presence of indoles and urobilinogen in a sample. The reagent reacts with these substances to produce a pink or red color, indicating their presence.
Preparation
Ehrlich's reagent is prepared by dissolving p-dimethylaminobenzaldehyde in a solution of hydrochloric acid and alcohol. The resulting solution is then ready to be used as a reagent in various tests.
Related Terms
- Indole: An aromatic heterocyclic organic compound. It is a fundamental component of many natural substances, such as tryptophan and auxins.
- Urobilinogen: A colorless compound produced in the intestine after the breakdown of bilirubin. It is converted to urobilin and excreted in the urine.
- Paul Ehrlich: A German physician and scientist who made significant contributions to the fields of hematology, immunology, and chemotherapy.
External links
- Medical encyclopedia article on Ehrlich's reagent
- Wikipedia's article - Ehrlich's reagent
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