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NBD-Cl
4-Chloro-7-nitrobenzofurazan; CAS 10199-89-0
NBD-Cl is widely used to label peptides, proteins, drugs and other biomolecules. It is also a popular derivatizing reagent for HPLC analysis. NBD-Cl is non-fluorescent, and generates fluorescent adducts upon reacting with aliphatic amines or thiol compounds. It reacts with amino groups such as aliphatic amines, amino acids, peptides, and proteins to form highly fluorescent compounds. The NBD-amine adducts have ?ex = 464 nm and ?em = 512 nm in aqueous solutions. The fluorescence spectra of NBD-amine adducts are highly environment-sensitive, the fluorescence intensity decreases significantly in aqueous solutions. NBD-Cl also reacts with thiol group to form fluorescent adducts, but the thiol adducts are much less fluorescent than the amine adducts.
Chemical structure for NBD-Cl [4-Chloro-7-nitrobenzofurazan] *CAS 10199-89-0*
Chemical structure for NBD-Cl [4-Chloro-7-nitrobenzofurazan] *CAS 10199-89-0*
CatalogSize
Price
Quantity
82525 mg
Price
 
Physical properties

Molecular weight199.55
SolventDMSO
Spectral properties

Extinction coefficient (cm -1 M -1)
22000
Excitation (nm)467
Emission (nm)539
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
CAS10199-89-0
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Page updated on October 13, 2025