logo
AAT Bioquest

XFD350 azide

Product key features

  • Ex/Em: 343/441 nm
  • Extinction coefficient: 19,000 cm-1M-1
  • Reactive Group: Azide
  • Click Chemistry Conjugation: Efficiently and rapidly labels terminal alkynes via CuAAC and copper-free SPAAC
  • Moderate Brightness & pH Stability: Ideal for high-abundance targets and maintains consistent fluorescence across a broad pH range (4–11)
  • High Contrast: Minimizes spectral overlap with common fluorophores like fluorescein and XFD488, enhancing multiplexing and signal clarity

Product description

XFD350, manufactured by AAT Bioquest, is structurally similar to Alexa Fluor® 350 (Thermo Fisher). This blue-fluorescent dye exhibits strong absorption and moderate photostability, with consistent fluorescence across a broad pH range (pH 4-11). XFD350 is effectively excited by the 350 nm line of a UV laser, and its moderate brightness and stability make it particularly advantageous for direct imaging of high-abundance targets in both microscopy and flow cytometry applications.

The azide derivative of XFD350 is widely used for labeling terminal alkynes on peptides, antibodies, and other biomolecules via click chemistry. It participates in copper-catalyzed azide-alkyne cycloaddition (CuAAC) with alkyne-containing molecules and strain-promoted alkyne-azide cycloaddition (SPAAC) with DBCO- or BCN-containing molecules.

Spectrum

Product family

NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)
XFD350 TCO34344119000-0.250.19
XFD350 tetrazine34344119000-0.250.19
XFD405 azide40142135,000-0.230.70
XFD430 azide43254015,000--0.28
XFD488 azide499520710000.9210.300.11
XFD514 azide51854380000-0.310.18
XFD532 azide534553810000.6110.240.09
XFD546 azide5615721120000.7910.210.12
XFD555 azide5535681500000.110.080.08
XFD568 azide579603913000.6910.450.46
XFD594 azide590618900000.6610.430.56
XFD610 azide611629144,000-0.430.44
XFD633 azide632650159,000--0.55
XFD635 azide633647140,000---
XFD647 Azide6506712700000.331-0.03
XFD660 azide663691132000-0.000.10
XFD680 azide6817041840000.3610.000.05
XFD700 azide6967191920000.2510.000.07
XFD750 azide7527762400000.1210.000.04
XFD790 azide782805260,000-0.090.08
Show More (11)
Page updated on August 29, 2025

Ordering information

Price
Unit size
Catalog Number70002
Quantity
Add to cart

Additional ordering information

Telephone1-800-990-8053
Fax1-800-609-2943
Emailsales@aatbio.com
InternationalSee distributors
Bulk requestInquire
Custom sizeInquire
Technical SupportContact us
Purchase orderSend to sales@aatbio.com
ShippingStandard overnight for United States, inquire for international
Request quotation

Physical properties

Molecular weight

381.36

Solvent

DMSO

Spectral properties

Correction Factor (260 nm)

0.25

Correction Factor (280 nm)

0.19

Extinction coefficient (cm -1 M -1)

19000

Excitation (nm)

343

Emission (nm)

441

Storage, safety and handling

Certificate of OriginDownload PDF
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22

Storage

Freeze (< -15 °C); Minimize light exposure
UNSPSC12171501