Eosin Y

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Eosin Y
Names
IUPAC name
2-(2,4,5,7-Tetrabromo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate [in its deprotonated form]
Other names
C.I. 45380
C.I. Acid Red 87
Eosin Yellow
Properties
C20H6Br4Na2O5
Molar mass 647.89052 g/mol
Appearance Reddish powder
Density 1.018 g/cm3
Melting point 295.5 °C (563.9 °F; 568.6 K)
Boiling point (decomposes)
Slightly soluble
Hazards
Safety data sheet Sigma-Aldrich
Lethal dose or concentration (LD, LC):
2,000 mg/kg (rat, oral)
Related compounds
Related compounds
Fluorescein
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Eosin Y, also called C.I. 45380 or C.I. Acid Red 87, is a member of the triarylmethane dyes.

Properties

Chemical

It is commonly used in histology, most notably in the H&E (Haematoxylin and Eosin) stain.

Physical

Eosin Y is a reddish solid, soluble in organic solvents.

Availability

Eosin Y is sold by chemical suppliers.

Preparation

Can be synthesized by brominating fluorescein.

Projects

  • Hystological dye
  • Papanicolaou stain

Handling

Safety

The compound doesn't appear to be harmful at low concentrations.

Storage

In closed airtight bottles.

Disposal

Eoxin Y doesn't require any special disposal.

References

Relevant Sciencemadness threads