Hoechst 33342 trihydrochloride (solution)
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Hoechst 33342 trihydrochloride (solution) is a marker dye in Hoechst series. Hoechst is A live nuclear marker dye. Hoechst binds to the grooves in the DNA double strand, which tends to be A/ T-rich DNA strand. Although it binds to all nucleic acids, the A/ T-rich double strand DNA significantly enhances fluorescence intensity Therefore,Hoechst dye can be used for living cell labeling. The fluorescence intensity of Hoechst dye increases with the increase of pH of solution.
Solvent and Concentration: Sterile water: 10 mg/mL
For research use only. We do not sell to patients.
- CAS No.: 875756-97-1
- Formula: C27H31Cl3N6O
- Molecular Weight:561.94
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Storage:
Please store the product under the recommended conditions in the Certificate of Analysis.
Biological Activity
Description
Solvent and Concentration: Sterile water: 10 mg/mL
In Vitro
Guidelines (Following is our recommended protocol. This protocol only provides a guideline, and should be modified according to your specific needs).
1. Preparation of Hoechst working solution
The corresponding stock solution can be diluted according to the actual situation. Note that if the solvent is DMSO, the cytotoxicity of DMSO must be considered, and a solvent control should be prepared; if the solvent is pure water, the working solution needs to be filtered and sterilized before adding cells.
2. Cell staining (Suspension cells)
2.1 Centrifuge at 1000 g at 4°C for 3-5 minutes and then discard the supernatant. Wash twice with PBS, 5 minutes each time. The cell density is 1×106/mL.
2.2 Add 1 mL of working solution, and then incubate at room temperature for 3-10 minutes.
2.3 Centrifuge at 400 g at 4°C for 3-4 minutes and then discard the supernatant.
2.4 Wash twice with PBS, 5 minutes each time.
2.5 Resuspend cells with serum-free cell culture medium or PBS. Observation by fluorescence microscopy or flow cytometry.
3. Cell staining (Adherent cells)
3.1 Culture adherent cells on sterile coverslips.
3.2 Remove the coverslip from the medium and aspirate excess medium.
3.3 Add 100 μL of working solution, gently shake it to completely cover the cells, and then incubate at room temperature for 3-10 minutes.
3.4 Wash twice with medium, 5 minutes each time. Observation by fluorescence microscopy or flow cytometry.
Precautions
1. Please adjust the concentration of Hoechst working solution according to the actual situation.
2. This product is for R&D use only, not for drug, household, or other uses.
3. For your safety and health, please wear a lab coat and disposable gloves to operate.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only. Further protocols information, click here.
Chemical Information
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CAS No. 875756-97-1
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Appearance Liquid
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Molecular Weight 561.94
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Formula C27H31Cl3N6O
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Color Yellow to green
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SMILES
[H]Cl.[H]Cl.[H]Cl.CN1CCN(C2=CC=C3C(N=C(C4=CC=C5C(N=C(C6=CC=C(OCC)C=C6)N5)=C4)N3)=C2)CC1
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Please store the product under the recommended conditions in the Certificate of Analysis.
Protocols
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Nuclear DNA counterstaining and nuclear morphology staining
Nuclear DNA counterstaining uses DNA-binding fluorescent dyes to visualize nuclei and chromatin so that nuclei can be located, counted, segmented, and evaluated for morphology; Hoechst 33342, DAPI, propidium iodide, and DRAQ5 are commonly reported nuclear stains, while live-cell DNA labeling is better supported for Hoechst dyes and DRAQ5 than for propidium iodide in intact viable cells. Nuclear morphology staining can detect apoptosis-associated nuclear changes, including chromatin condensation, nuclear shrinkage, nuclear fragmentation, reduced nuclear area/perimeter/axis length, and increased nuclear fluorescence intensity; these morphology readouts have been compared with apoptosis markers such as TUNEL and caspase-3 immunofluorescence.
Purity & Documentation
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Data Sheet (268 KB)
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SDS (252 KB)
- English - EN (252 KB)
- Français - FR (252 KB)
- Deutsch - DE (252 KB)
- Norwegian - NO (252 KB)
- Español - ES (252 KB)
- Swedish - SV (252 KB)
- Italian - IT (252 KB)
- Korean - KR (252 KB)
- Portuguese - PT (252 KB)
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Handling Instructions (2659 KB)
References
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)