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Eosin B (C.I. 45400), 25 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
WGK 1
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
Type analysis

€29.60/Pack Qty. 

excl. VAT. | 25 g per Pack Qty.

Art. No. 0306.2

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Free of shipping costs from 125 €
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from 6 Pack Qty. €28.12/Pack Qty.
from 24 Pack Qty. €26.64/Pack Qty.
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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 
Handling area pH 1,7 - 1,8 
Eosin B (C.I. 45400)
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Order No. Pack Qty. Pack. Price Quantity
0306.1 10 g glass €18.20
0306.2 25 g glass €29.60
0306.3 50 g glass €46.15
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Indicators and Dyes

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


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The following analysis certificates have been found:

Type analysis

Appearancedark red powder  
Maximum absorption510-530 nm  

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