Alizarin, Alizarin Carmine

Alizarin, Alizarin Carmine is a red aniline dye obtained from anthracene (previously it was obtained from the madder plant (Rubia tinctorum)). Alizarin is insoluble in water, but dissolves well in alkalis, alcohol and other similar substances. Used as a pH indicator and as a histochemical reagent for calcium, thallium, titanium and zirconium.

Alizarin carmine is a red aniline dye that is obtained from anthrene. In the past, it was obtained from the marinum plant. The dye is insoluble in water and dissolves well in alkaline solutions and alcohol. It is used as a pH indicator and a histochemical reagent for calcium, thallium, titanium, zirconium.

Alizarin and carmine alizarin are two different dyes, but both are used as pH indicators and as histochemical reagents for calcium, thallium and other metals.

Alizarin is a red aniline dye that is derived from anthracene, which in turn is derived from madder dye. Alizarin is poorly soluble in water, but dissolves well in alcohol, alkalis and other similar solvents.

Alizarin carmine, unlike alizarin, is derived from carmine, also known as carmoisine. Carmine is an arylated anthrone that is produced by reducing the carboxyl group in the aniline dye molecule alizarin.

Both dyes are used in histochemistry to determine calcium, thallium and titanium in tissues. They can also be used as indicators of acidity in biological fluids such as blood and urine.

In general, alizarin and alizarin carmine are important chemical compounds that are widely used in various fields, including medicine, chemistry, and materials science.