Ponceau 6R
Names
Other names
Ponceau 6R
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.018.584
E number E126 (colours)
UNII
  • [Na+].[Na+].[Na+].[Na+].Oc1cc(c2ccccc2c1N=Nc3c(O)c(cc4cc(cc(c34)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-]
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).
Infobox references

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.

Amaranth is a closely related azo dye, also usable in trichrome staining.

References

  1. ↑ PubChem. "Crystal Ponceau 6R". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-11-26.
  2. 1 2 3 "Crystal ponceau 6R, red powder C.I. 16250". VWR. Retrieved 2022-11-26.
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