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Hoechst 33258 *20 mM solution in water*

The Hoechst stains are a family of fluorescent stains for labeling DNA in fluorescence microscopy. Because these fluorescent stains label DNA, they are also commonly used to visualize nuclei and mitochondria. Two of these closely related bis-benzimides are commonly used: Hoechst 33258 and Hoechst 33342. Both dyes are excited by ultraviolet light at around 350 nm, and both emit blue/cyan fluorescence light around an emission maximum at 461 nm. The Hoechst stains may be used on live or fixed cells, and are often used as a substitute for another nucleic acid stain, DAPI. The key difference between them is that the additional ethyl group of Hoechst 33342 renders it more lipophilic, and thus more able to cross intact cell membranes. In some applications, Hoechst 33258 is significantly less permeant. These dyes can also be used to detect the contents of a sample DNA by plotting a standard emission-to-content curve.

Spectrum

Citations

View all 2 citations: Citation Explorer
Protective Effects of Crataegus pinnatifida Extracts and Crataegolic Acid Against Neurotoxicity of Paraquat in PC12 Cells.
Authors: Chang, Chi-Sen and Shen, Yuh-Chiang and Juan, Chi-Wen and Chang, Chia-Lin and Lin, Po-Kai
Journal: Current Topics in Nutraceutical Research (2022)
Effects of cyclosporin A pre-treatment combined with etomidate post-treatment on lung injury induced by limb ischemia-reperfusion in rats
Authors: Zou, Haibo and Sun, Xiaofeng
Journal: Journal of International Medical Research (2020): 0300060520934627

References

View all 42 references: Citation Explorer
DNA sequence recognition by Hoechst 33258 conjugates of hairpin pyrrole/imidazole polyamides
Authors: Correa BJ, Canzio D, Kahane AL, Reddy PM, Bruice TC.
Journal: Bioorg Med Chem Lett (2006): 3745
Recognition of B-DNA by neomycin--Hoechst 33258 conjugates
Authors: Willis B, Arya DP.
Journal: Biochemistry (2006): 10217
Design of new bidentate ligands constructed of two Hoechst 33258 units for discrimination of the length of two A3T3 binding motifs
Authors: Tanada M, Tsujita S, Sasaki S.
Journal: J Org Chem (2006): 125
The Hoechst 33258 Covalent Dimer Covers a Total Turn of the Double-stranded DNA
Authors: Streltsov SA, Gromyko AV, Oleinikov VA, Zhuze AL.
Journal: J Biomol Struct Dyn (2006): 285
Amine terminated G-6 PAMAM dendrimer and its interaction with DNA probed by Hoechst 33258
Authors: Choi YS, Cho TS, Kim JM, Han SW, Kim SK.
Journal: Biophys Chem (2006): 142
Page updated on November 7, 2024

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Catalog Number17525
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Physical properties

Molecular weight

533.88

Solvent

Water

Spectral properties

Extinction coefficient (cm -1 M -1)

460001

Excitation (nm)

352

Emission (nm)

454

Quantum yield

0.03401

Storage, safety and handling

H-phraseH303, H313, H340
Hazard symbolT
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R68

Storage

Freeze (< -15 °C); Minimize light exposure
UNSPSC41116134

CAS

23491-45-4