Purpurin(1,2,4-trihydroxy-9,10-anthraquinone) 90% (dye content), Sigma-Aldrich®
Supplier: SIGMA-ALDRICH MICROSCOPY
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Warning
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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
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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