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Phloxine
Chemical compound / From Wikipedia, the free encyclopedia
Phloxine B (commonly known simply as phloxine) is a water-soluble red dye used for coloring drugs and cosmetics in the United States[2] and coloring food in Japan.[3] It is derived from fluorescein, but differs by the presence of four bromine atoms at positions 2, 4, 5 and 7 of the xanthene ring and four chlorine atoms in the carboxyphenyl ring.[4] It has an absorption maximum around 540 nm and an emission maximum around 564 nm.[5] Apart from industrial use, phloxine B has functions as an antimicrobial substance, viability dye and biological stain.[6] For example, it is used in hematoxylin-phloxine-saffron (HPS) staining to color the cytoplasm and connective tissue in shades of red.[7]
Quick Facts Names, Identifiers ...
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Names | |
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Preferred IUPAC name
Disodium 2′,4′,5′,7′-tetrabromo-4,5,6,7-tetrachloro-3-oxo-3H-spiro[[2]benzofuran-1,9′-xanthene]-3′,6′-bis(olate) | |
Other names
Cyanosin; Cyanosine; Eosine bluish; Eosine Blue; Cyanosin B; Eosin Blue; Phloxine P; Phloxin B; Eosine I Bluish; Acid red 92; C.I. 45410; D & C Red no. 28 | |
Identifiers | |
3D model (JSmol) |
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ChEBI | |
ECHA InfoCard | 100.038.490 ![]() |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C20H2Br4Cl4Na2O5 | |
Molar mass | 829.63 g·mol−1 |
Appearance | Red to brown powder |
Soluble | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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