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AzoDye-2 PEG10 Alkyne

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Physical properties
Molecular weight984.11
Spectral properties
Absorbance (nm)554
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
Alternative formats
AzoDye-2-PEG10 Azide


Molecular weight
Absorbance (nm)
AzoDye-2 PEG10 alkyne is an excellent building block for labeling azide-containing molecules. It contains a PEG10 spacer that significantly improves its water solubility compared to AzoDye-2 alkyne (#2434) although both AzoDye-2 alkyne (#2434) and AzoDye-2 PEG10 alkyne (#2435) bear the same extremely hydrophobic BHQ-2 chromophore. AzoDye-2 dyes are nearly non-fluorescent with moderate extinction coefficients. These dark quenchers are most typically used in Molecular Beacon probes in which FRET has minimal contribution to their fluorescence quenching, thus dependence on donor-acceptor spectral overlap is not significant as to other FRET probes such as FRET peptides. AzoDye-2 dyes can quench a variety of fluorophores, in particular, fluorescein derivatives such as FAM, HEX, TET, NED and JOE. This may reflect the AzoDye-2's ability to form stable, non-fluorescent complexes with a fluorophore.


Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of AzoDye-2 PEG10 Alkyne to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM101.615 µL508.073 µL1.016 mL5.081 mL10.161 mL
5 mM20.323 µL101.615 µL203.229 µL1.016 mL2.032 mL
10 mM10.161 µL50.807 µL101.615 µL508.073 µL1.016 mL

Molarity calculator

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Spectral properties

Absorbance (nm)554



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