Products / pH Indicators

Show all minimise

ALIZARIN RED S pdf-img printer-img

  • C.A.S. No.
  • 130-22-3
  • CI NO
  • 58005
  • M.F.
  • C14H6Na2O7S
  • M.W.
  • 360.28gm/mole


  • Dye content
  • >70%
  • Transition range
  • pH4.3-6.3
    pH 9.4-12.0
    Brown orange-violet
  • Solubility 0.1%(water)
  • Clear Solution
  • Absorption maximum in 0.1N NaOH λ1max
  • 553-559nm
  • Absorption maximum 0.1N NaOH λ2max
  • 592-599nm
  • Absorptivity (A1%/1cm at 556 λ1max)
  • >350
  • Absorptivity (A1%/1cm at 595 λ2max)
  • >325
  • Loss on drying (110oC)
  • <5%>
  • Suitability for microscopy
  • To passes test
oragnic structure


Gspchem manufactures purest grade of Alizarin Red S in the pH Indicators industry of world market .Alizarin Red S is a water-soluble sodium salt of Alizarin sulfonic acid .It was discovered by Graebe and Libermann in 1871. The chemical formula for Alizarin Red S is C14H7NaO7S.In the histology field , Alizarin Red S is been used to stain calcium deposits in tissue .In the geology field ,it is used to stain and differentiate carbonate minerals. Its Molecular weight is 360.28gm/mole. Gspchem is well known in the world market as an Alizarin Red S manufacturer.

Site Designers - Fecund Technologies