Purpurin(1,2,4-trihydroxy-9,10-anthraquinone) 90% (dye content), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY
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229148-5GEA 98.2 EUR
229148-5G
Purpurin(1,2,4-trihydroxy-9,10-anthraquinone) 90% (dye content), Sigma-Aldrich®
Purpurin(1,2,4-trihydroxy-9,10-anthraquinone)

Purpurin (1, 2, 4-trihydroxyanthraquinone) is the key pigment present in the roots of Indian madder (Rubia cordifolia). This pigment produces colors, with distinctive heat and light resistant properties.


  • Nuclear stain in histology

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Specification Test Results

Appearance (Colour) Conforms to Requirements
Dark Red to Orange-Brown or Brown
Appearance (Form) Powder
Infrared spectrum Conforms to Structure
Wavelength 254 - 260 nm
Extinction Coefficient ≥17000
Wavelength 511 - 517 nm
Extinction Coefficient ≥7000
c = 0.01 g/L, Methanol
Carbon 58.4 - 72.8%
Purity (HPLC) Typically 70 - 85%
Solubility (Turbidity) Clear to Turbid
c = 1 mg/ml, NH₄OH
Solubility (Colour) Conforms to Requirements
Red to Very Dark Red to Purple

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