Ponceau 6R, or Crystal ponceau 6R, Crystal scarlet, Brilliant crystal scarlet 6R, Acid Red 44, or C.I. 16250,[1][2] is a red azo dye. It is soluble in water[2] and slightly soluble in ethanol. It was used as a food dye, formerly having E number E126. It is also used in histology, for staining fibrin with the MSB Trichrome stain.[2] It usually comes as disodium salt.
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Other names
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3D model (JSmol)
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| ECHA InfoCard | 100.018.584 |
| E number | E126 (colours) |
PubChem CID
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| Properties | |
| C20H12N2Na2O7S2 | |
| Molar mass | 502.42 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Amaranth is a closely related azo dye, also usable in trichrome staining.
References
edit- ^ PubChem. "Crystal Ponceau 6R". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-11-26.
- ^ a b c "Crystal ponceau 6R, red powder C.I. 16250". VWR. Retrieved 2022-11-26.
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