Ponceau 6R
Chemical compound / From Wikipedia, the free encyclopedia
This article is about Ponceau 6R. For other uses, see Ponceau (disambiguation).
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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ECHA InfoCard | 100.018.584 |
E number | E126 (colours) |
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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.