Cyanine3B carboxylic acid

Cyanine3B Carboxylic acids

Cat. #	Quantity	Price	Lead time
2321-1mg	1 mg	$125	in stock
2321-5mg	5 mg	$325	in stock
2321-25mg	25 mg	$850	in stock
2321-50mg	50 mg	$1490	in stock
2321-100mg	100 mg	$2450	in stock

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Cyanine3B is a yellow-emitting cyanine dye that is an improved version of the Cyanine3 fluorophore with significantly higher fluorescence quantum yield and photostability.

Cyanine3B carboxylic acid is a non-reactive form of Cyanine3B that can be used as a reference standard in experiments using conjugates of this fluorophore. Cyanine3B carboxylic acid can also be used to synthesize activated esters or modified with hydrazines, hydroxylamines, and amines for subsequent conjugation with biomolecules.

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Cyanine3B absorbance and emission spectra

General properties

Appearance:	dark red powder
Molecular weight:	560.67
CAS number:	228272-69-3
Molecular formula:	C₃₁H₃₂N₂O₆S
Solubility:	good in DMF, DMSO
Quality control:	NMR ¹H and HPLC-MS (95+%)
Storage conditions:	24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate.
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

This Product is offered and sold for research purposes only. It has not been tested for safety and efficacy in food, drug, medical device, cosmetic, commercial or any other use. Supply does not express or imply authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, in the manufacture of food or pharmaceutical products, in medical devices or in cosmetic products.