logo
Products
Technologies
Applications
Services
Resources
Selection Guides
About
Cy3B TCO
Cy3® dye is one of the most common cyanine dyes used for labeling proteins, nucleic acids and other biological molecules. A variety of Cy3® dyes has been used to label biological molecules for fluorescence imaging and other fluorescence-based biochemical analysis. They are widely used for labeling peptides, proteins and oligos etc. However, Cy3 suffers low fluorescence intensity. It is the least fluorescent dyes among all the Cy dyes. Cy3B is an improved version of Cy3 dyes with significantly increased fluorescence quantum yield and photostability. Cy3B TCO can be used for conjugations with tetrazine-containing biological molecules under copper-free conditions. Compared to the other click reactions, the TCO-tetrazine reaction gives much higher yields under mild reaction conditions. Cy3® is the trademark of GE Healthcare.
Chemical structure for Cy3B TCO.
Chemical structure for Cy3B TCO.
protocol
Protocol
sds
SDS
COA
CatalogSize
Price
Quantity
9461 mg
Price
 
Physical properties
Molecular weight1283.58
SolventDMSO
Spectral properties
Correction factor (260 nm)0.048
Correction factor (280 nm)0.069
Extinction coefficient (cm -1 M -1)
120000
1
Excitation (nm)560
Emission (nm)571
Quantum yield
0.58
1
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
Contact us
Telephone
Fax
Emailsales@aatbio.com
InternationalSee distributors
Bulk requestInquire
Custom sizeInquire
Technical SupportContact us
Request quotationRequest
Purchase orderSend to sales@aatbio.com
ShippingStandard overnight for United States, inquire for international
Page updated on October 16, 2025