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Eosin B (C.I. 45400), 50 g, glass

for microscopy
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4',5'-Dibromo-2',7'-dinitrofluorescein-disodium salt, Eosin scarlet, Eosin bluish
Empirical formula C20H6Br2N2Na2O9
Molar mass (M) 624,09 g/mol
Melting point (mp) 310 °C
CAS No. 548-24-3
EG-Nr. 208-943-1

Dissolve 0.5-2.0 % in water or ethanol

Like eosin Y used as a plasma stain, e.g. for hematoxylin-eosin (H&E) staining. Soluble in water and ethanol.
Product details

€50.45/Pack Qty. 

excl. VAT. | 50 g per Pack Qty.

Art. No. 0306.3

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Product details

Eosin B (C.I. 45400) for microscopy

Like eosin Y used as a plasma stain, e.g. for hematoxylin-eosin (H&E) staining. Soluble in water and ethanol.

Technical Information
Absorption maximum 525 nm 
Emissions maximum 545 nm 
Colour conversion colourless - pink fluorescent 
Transition range pH 1,7 - 1,8 
Eosin B (C.I. 45400)
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Art. No. Pack Qty. Pack. Price Quantity
0306.1 10 g glass


0306.2 25 g glass


0306.3 50 g glass


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Downloads / MSDS

General information

Indicators and Dyes

Carl ROTH offers many indicators and dyes of high purity, which can be used in special applications.

Certificates of Analysis

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The following analysis certificates have been found:

Type analysis

Appearancedark red powder
Maximum absorption510-530 nm