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230251

Sigma-Aldrich

Eosin Y

75% (HPLC)

Synonym(s):

2′,4′,5′,7′-Tetrabromofluorescein, Acid Red 87, Bromo acid J. TS, XL, or XX, Bromofluorescein, Bronze Bromo ES, Eosin yellowish, Solvent red 43

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About This Item

Empirical Formula (Hill Notation):
C20H8Br4O5
CAS Number:
15086-94-9
Molecular Weight:
647.89
Colour Index Number:
45380:2
EC Number:
239-138-3
MDL number:
MFCD00036189
UNSPSC Code:
12171500
PubChem Substance ID:
24853789
NACRES:
NA.47
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Quality Level

100

Assay

75% (HPLC)

form

powder

color

orange to very dark orange

solubility

spirit: soluble

λmax

524 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Oc1c(Br)cc2c(Oc3c(Br)c(O)c(Br)cc3C24OC(=O)c5ccccc45)c1Br

InChI

1S/C20H8Br4O5/c21-11-5-9-17(13(23)15(11)25)28-18-10(6-12(22)16(26)14(18)24)20(9)8-4-2-1-3-7(8)19(27)29-20/h1-6,25-26H

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shipped in

dry ice

shipped in

dry ice

shipped in

dry ice

shipped in

dry ice

packaging

pkg of 1 × 1 g (541602P-1g), pkg of 5 × 100 mg (541602P-500mg), pkg of 1 × 100 mg (541602P-100mg)

packaging

pkg of 1 × 50 g (541601G-50g)

packaging

pkg of 2 × 20 mL (541602C-1g), pkg of 1 × 4 mL (541602C-100mg), pkg of 5 × 4 mL (541602C-500mg)

packaging

pkg of 1 × 100 mg (141101P-100mg), pkg of 5 × 100 mg (141101P-500mg)

storage temp.

−20°C

storage temp.

−20°C

storage temp.

−20°C

storage temp.

−20°C

form

powder

form

granular

form

chloroform solution

form

powder

manufacturer/tradename

Avanti Research™ - A Croda Brand

manufacturer/tradename

Avanti Research™ - A Croda Brand

manufacturer/tradename

Avanti Research™ - A Croda Brand

manufacturer/tradename

Avanti Research™ - A Croda Brand

lipid type

lipid extracts

lipid type

phosphoglycerides
phospholipids

lipid type

lipid extracts

lipid type

lipid extracts

General description

Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm. In histopathology, it is applied as a counterstain after hematoxylin and before methylene blue. It is also used as a background stain, thereby giving contrast to the nuclear stains.[1][2]

Application

Eosin Y has been used as a reagent in the preparation of Nigrosin-Eosin (NE) stain and is used in hematoxylin and eosin (H&E) staining technique to visualize alginate.[3][4]

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves
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    The cbb(I) region of Rhodopseudomonas palustris (Rp. palustris) contains the cbbLS genes encoding form I ribulose-1,5-bisphosphate (RuBP) carboxylase oxygenase (RubisCO) along with a divergently transcribed regulator gene, cbbR. Juxtaposed between cbbR and cbbLS are the cbbRRS genes, encoding an unusual
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