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212954

Sigma-Aldrich

Eosin B

Dye content 95 %

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Synonym(s):
Acid Red 91
Empirical Formula (Hill Notation):
C20H8Br2N2O9
CAS Number:
Molecular Weight:
580.09
Colour Index Number:
45400
MDL number:
PubChem Substance ID:
NACRES:
NA.47

form

powder, crystals or chunks

composition

Dye content, 95%

mp

275 °C (dec.) (lit.)

solubility

spirit: soluble

λmax

522 nm

ε (extinction coefficient)

≥7000 at 515-521 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

OC(=O)c1ccccc1C2=C3C=C(C(=O)C(Br)=C3Oc4c(Br)c(O)c(cc24)[N+]([O-])=O)[N+]([O-])=O

InChI

1S/C20H8Br2N2O9/c21-14-16(25)11(23(29)30)5-9-13(7-3-1-2-4-8(7)20(27)28)10-6-12(24(31)32)17(26)15(22)19(10)33-18(9)14/h1-6,25H,(H,27,28)

InChI key

YDIYPOHFEIEJPE-UHFFFAOYSA-N

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1 of 4

This Item
861006E4009199540
Eosin B Dye content 95 %

Sigma-Aldrich

212954

Eosin B

Eosin B certified by the Biological Stain Commission, Dye content 90 %

Sigma-Aldrich

861006

Eosin B

Eosin Y Dye content ~99 %

Sigma-Aldrich

E4009

Eosin Y

Ethyl eosin certified by the Biological Stain Commission

Sigma-Aldrich

199540

Ethyl eosin

composition

Dye content, 95%

composition

Dye content, 90%

composition

Dye content, ~99%

composition

Dye content, 95%

mp

275 °C (dec.) (lit.)

mp

-

mp

-

mp

-

solubility

spirit: soluble

solubility

H2O: 1 mg/mL, clear, red

solubility

ethanol: 1 mg/mL

solubility

-

λmax

522 nm

λmax

395 nm, 514 nm

λmax

-

λmax

532 nm

ε (extinction coefficient)

≥7000 at 515-521 nm

ε (extinction coefficient)

-

ε (extinction coefficient)

-

ε (extinction coefficient)

-

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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