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Alizarin is the main ingredient for the manufacture of the madder lake pigments known to painters as Rose madder and Alizarin crimson. A notable use of alizarin in modern times is as a staining agent in biological research because it stains free calcium and certain calcium compounds a red or light purple color. Alizarin Red is used in a biochemical assay to determine, quantitatively by colorimetry, the presence of calcific deposition by cells of an osteogenic lineage.
Azeem SM1,; Arafa WA,; el-Shahat MF.Synthesis and application of alizarin complexone functionalized polyurethane foam: preconcentration/separation of metal ions from tap water and human urine. J Hazard Mater. 2010, 182 (1-3),286-94.
E. Palomares,; R. Vilar,; A. Green,;J.?R. Durrant. Alizarin Complexone on Nanocrystalline TiO2: A Heterogeneous Approach to Anion Sensing. Advanced Functional Materials 2004, 14 (2),111-115.