Coomassie brilliant blue G-250, dark reddish purple powder C.I. 42655

Supplier: MP Biomedicals

Synonyms: C.I. 42655

ICNA0219034305EA 71.5 EUR
ICNA0219034305 ICNA0219034325 ICNA0219034380
Coomassie brilliant blue G-250, dark reddish purple powder C.I. 42655
Coomassie brilliant blue G-250

Coomassie Brilliant Blue G-250 is a protein stain in electrophoresis. Brilliant Blue G has been used in the Bradford dye-binding protein assay.


A mechanism for dye binding to protein has been proposed, based on measuring Coomassie Brilliant Blue G-250 (CBBG) absorbance spectra during titration of the dye reagent in the absence of protein and its response to different polyamino acids. Brilliant Blue G has been used for determining critical micelle concentration of detergents. It is a P2X7 purinergic receptor antagonist.


A mechanism for dye binding to protein has been proposed, based on measuring Coomassie Brilliant Blue G-250 (CBBG) absorbance spectra during titration of the dye reagent in the absence of protein and its response to different polyamino acids. Brilliant Blue G has been used for determining critical micelle concentration of detergents. It is a P2X7 purinergic receptor antagonist.


Soluble in hot water (50 mg/ml), ethanol (40 mg/ml), methanol and 10% trichloroacetic acid. Soluble in water (1 mg/ml) yielding dark Blue Solution.

Formula: C₄₇H₄₈N₃NaO₇S₂
MW: 854,04 g/mol
Density: >1 g/cm³ (20 °C)
MDL Number: MFCD00078482
CAS Number: 6104-58-1

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Specification Test Results

Identity Test Passes
UV/VIS: l max (methanol) 608 ± 3 nm

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