Cyanine3B maleimide

Maleimides Cyanine3B

Cat. #	Quantity	Price	Lead time
19380	1 mg	$250	in stock
29380	5 mg	$450	in stock
49380	25 mg	$1750	in stock

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Cyanine3B is one of the brightest fluorophores possessing high sensitivity. Cyanine3B dye maleimide is used to produce maleimide-thiol conjugates via thiols to antibodies, peptides, and other biomolecules with Cyanine3B fluorophore with high fluorescence quantum yield and photostability. Michael-addition of a thiol to a maleimide approach enables the selective method of antibody labeling.

This is a sulfonated dye and can be used for efficient labeling in water buffers.

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Cyanine3B absorption and emission spectra

Recommended protocol

Maleimide Labeling of Proteins and Other Thiolated Biomolecules

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General properties

Appearance:	golden-purple powder
Molecular weight:	682.80
Molecular formula:	C₃₇H₃₈N₄O₇S
Solubility:	in DMSO, DMF
Quality control:	NMR ¹H and HPLC-MS (90+%)
Storage conditions:	12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate. Avoid prolonged exposure to light.
MSDS:	Download
	Product specifications

Spectral properties

Excitation/absorption maximum, nm:	559
ε, L⋅mol⁻¹⋅cm⁻¹:	121000
Emission maximum, nm:	571
Fluorescence quantum yield:	0.68
CF₂₆₀:	0.044
CF₂₈₀:	0.077

Product is offered and sold for research purposes only. Product is not tested for safety and efficacy in food, drug, medical device, cosmetic, no express or implied authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, for humans or animals or for commercial purposes.