ALIZARIN RED S excellent quality manufacturer, exporter and supplier. Alizarin is one of ten dihydroxyanthraquinone isomers. Its molecular structure can be viewed as being derived from anthraquinone by replacement of two neighboring hydrogen atoms (H) by hydroxyl groups (-OH). Alizarin Red is used in a biochemical assay to determine, quantitatively by colorimetry, the presence of calcific deposition by cells of an osteogenic lineage. In clinical practice, it is used to stain synovial fluid to assess for basic calcium phosphate crystals.

Technical Specifications:


C.A.S. No. 130-22-3
CI NO. 58005
M.F. C14H7NaO7S
M.W. 342.26gm/mole



Dye Content (by Spectrophotometry) >70%
Transition Range pH 4.3-6.3
  pH 9.4-12.0
  Brown Orange-Violet
Solubility 0.1% (Dist. Water) Clear solution
Absorption Max (0.1N NaOH) Lambda 1max 553-559nm
Absorption Max (0.1N NaOH) Lambda  2max 592-599nm
Absorptivity (A1%/1cm at 556  Lambda 1max) >350
Absorptivity (A1%/1cm at 595  Lambda 2max) >325
Loss On Drying (110°C) <5%
Suitability for microscopy Passes test

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