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.
![]() | |
Names | |
---|---|
Other names
| |
Identifiers | |
3D model (JSmol)
|
|
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.018.584 |
E number | E126 (colours) |
PubChem CID
|
|
UNII | |
| |
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).
|
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.