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AAT Bioquest

XFD430 acid

Product key features

  • Ex/Em: 432/540 nm
  • Extinction coefficient: 15,000 cm-1M-1
  • pH-Insensitive & High Hydrophilicity: Maintains stable fluorescence across pH 4–10 and minimizes aggregation
  • Large Stokes Shift: Provides clear signal separation and minimizes spectral overlap, enhancing imaging accuracy in sensitive applications

Product description

XFD430, manufactured by AAT Bioquest, is a green-fluorescent dye that is structurally identical to Alexa Fluor™ 430 (ThermoFisher). It has excitation and emission maxima of 432 nm and 540 nm, respectively, and is efficiently excited by a 405 nm violet laser. Its large Stokes shift minimizes spectral overlap with blue-emitting fluorophores, significantly improving the signal-to-noise ratio in multiplexed fluorescence assays. XFD430 also exhibits excellent water solubility and remains pH-insensitive across a wide range (pH 4–10), making it well-suited for generating stable, reproducible fluorescence signals in both microscopy and flow cytometry applications.

XFD430 acid is a non-reactive compound that can be employed as a reference standard in studies utilizing XFD430 conjugates. It is also suitable for use as a control in confocal microscopy, immunocytochemistry (ICC), high-content screening (HCS), flow cytometry, and live cell imaging applications. Furthermore, it can be utilized in the synthesis of activated esters and STP and can be coupled to hydrazines, hydroxylamines, or amines in aqueous solutions using water-soluble carbodiimides (e.g., EDAC). This allows for the conjugation of the dye to amino-containing molecules, such as proteins, antibodies, amine-modified oligonucleotides, and peptides.

Spectrum

Product family

NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)
XFD350 acid *Same Structure to Alexa Fluor™ 350 acid*34344119000-0.250.19
XFD405 acid40142135,000-0.230.70
XFD430 TCO43254015,000--0.28
XFD430 Tetrazine43254015,000--0.28
XFD488 acid *Same Structure to Alexa Fluor™ 488 acid*499520710000.9210.300.11
XFD514 acid51854380000-0.310.18
XFD532 acid *Same Structure to Alexa Fluor™ 532 acid*534553810000.6110.240.09
XFD546 acid *Same Structure to Alexa Fluor™ 546 acid*5615721120000.7910.210.12
XFD555 acid5535681550000.110.080.08
XFD568 acid *Same Structure to Alexa Fluor™ 568 acid*579603913000.6910.450.46
XFD594 acid590618900000.6610.430.56
XFD610 acid611629144,000-0.430.44
XFD633 acid632650159,000--0.55
XFD635 acid633647140,000---
XFD647 acid6506712700000.331-0.03
XFD660 acid663691132000-0.000.10
XFD680 acid6817041840000.3610.000.05
XFD700 acid6967191920000.2510.000.07
XFD750 acid7527762900000.121-0.04
XFD790 acid782805260,000-0.090.08
Show More (11)
Page updated on May 19, 2025

Ordering information

Price
Unit size
Catalog Number70020
Quantity
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Additional ordering information

Telephone1-800-990-8053
Fax1-800-609-2943
Emailsales@aatbio.com
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Purchase orderSend to sales@aatbio.com
ShippingStandard overnight for United States, inquire for international
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Physical properties

Molecular weight

705.88

Solvent

DMSO

Spectral properties

Correction Factor (280 nm)

0.28

Extinction coefficient (cm -1 M -1)

15,000

Excitation (nm)

432

Emission (nm)

540

Storage, safety and handling

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

Storage

Freeze (< -15 °C); Minimize light exposure
UNSPSC12352200