ortho-iodoHoechst 33258
Based on 3 publication(s) in Google Scholar
ortho-iodoHoechst 33258 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.
For research use only. We do not sell to patients.
- Purity: 98.01%
- CAS No.: 158013-41-3
- Formula: C25H23IN6
- Molecular Weight:534.39
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Storage:
4°C, protect from light
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)
Publications Citing Use of MedChemExpress (MCE) ortho-iodoHoechst 33258
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Biological Activity
Guide (The following is our recommended experimental protocol. This protocol is for reference only and should be adjusted according to your specific needs).
Preparation of Hoechst working solution
1.1 Preparation of stock solution
Prepare a 1 mg/mL Hoechst stock solution in DMSO.
Note: It is recommended to aliquot the Hoechst stock solution and store at -4°C or -20°C protected from light.
1.2 Preparation of working solution
Dilute the stock solution with pre-warmed serum-free cell culture medium or PBS to obtain a final concentration of 10 μg/mL Hoechst working solution.
Note: Adjust the concentration of Hoechst working solution according to actual needs and prepare fresh before use.
2. Cell staining (suspension cells)
2.1 Collect cells by centrifugation and wash twice with PBS, 5 min each time. Cell density: 1×106/mL.
2.2 Add 1 mL Hoechst working solution and incubate at room temperature for 3-10 min.
2.3 Centrifuge at 400 g for 3-4 min and discard the supernatant.
2.4 Wash cells twice with PBS, 5 min each time.
2.5 Resuspend cells in 1 mL serum-free medium or PBS and observe using a fluorescence microscope or flow cytometer.
3. Cell staining (adherent cells)
3.1 Culture adherent cells on sterile coverslips.
3.2 Remove the coverslips from the culture medium and aspirate excess medium.
3.3 Add 100 μL dye working solution, gently shake to fully cover the cells, and incubate for 3-10 min.
3.4 Remove the dye working solution, wash 2-3 times with culture medium (5 min each), and observe using a fluorescence microscope or flow cytometer.
Notes
1. Adjust the concentration of Hoechst working solution according to actual needs.
2. This product is for research use only by professionals and is not intended for clinical diagnosis or treatment, nor for use in food or drugs.
3. For your safety and health, please wear a lab coat and disposable gloves during operation.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Chemical Information
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CAS No. 158013-41-3
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Appearance Solid
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Molecular Weight 534.39
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Formula C25H23IN6
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Color Pink to red
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SMILES
CN1CCN(C2=CC=C3N=C(C4=CC=C5N=C(C6=CC=CC=C6I)NC5=C4)NC3=C2)CC1
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
4°C, protect from light
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)
Publications (3)
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Journal Impact Factor
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Most Recent
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Pharmaceuticals (Basel)
Enhancing Effects of Olaparib by Alpha- and Beta-Emitting Radionuclides, X-Rays, and Ultraviolet A Light in Combination with Ortho-IodoHoechst in a Prostate Cancer Cell Model. [Abstract]2024 Oct 30;17(11):1450. PMID: 39598362 -
Biomedicines
Comparison of Radio- and Phototoxicity in Association with an Enhancing Effect of the Photosensitizers Psoralen, Trioxsalen and Ortho-Iodo-Hoechst33258 on FaDu, PC-3, 4T1 and B16-F10 Cells. [Abstract]2024 Dec 31;13(1):73. PMID: 39857658 -
Solvent & Solubility
DMSO : 50 mg/mL (93.56 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
H2O : < 0.1 mg/mL (insoluble)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Purity & Documentation
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Data Sheet (275 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
[1]. a b c "Hoechst Stains". Invitrogren (Molecular Probes).
[2]. Latt SA, Stetten G, Juergens LA, Recent developments in the detection of deoxyribonucleic acid synthesis by 33258 Hoechst fluorescence. The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society 23 (7): 493-505. [Content Brief]
[3]. Portugal J, Waring MJ. Assignment of DNA binding sites for 4',6-diamidine-2-phenylindole and bisbenzimide (Hoechst 33258). A comparative footprinting study. Biochimica et Biophysica Acta 949 (2): 158-68. [Content Brief]
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 1.8713 mL | 9.3565 mL | 18.7129 mL | 46.7823 mL |
| 5 mM | 0.3743 mL | 1.8713 mL | 3.7426 mL | 9.3565 mL | |
| 10 mM | 0.1871 mL | 0.9356 mL | 1.8713 mL | 4.6782 mL | |
| 15 mM | 0.1248 mL | 0.6238 mL | 1.2475 mL | 3.1188 mL | |
| 20 mM | 0.0936 mL | 0.4678 mL | 0.9356 mL | 2.3391 mL | |
| 25 mM | 0.0749 mL | 0.3743 mL | 0.7485 mL | 1.8713 mL | |
| 30 mM | 0.0624 mL | 0.3119 mL | 0.6238 mL | 1.5594 mL | |
| 40 mM | 0.0468 mL | 0.2339 mL | 0.4678 mL | 1.1696 mL | |
| 50 mM | 0.0374 mL | 0.1871 mL | 0.3743 mL | 0.9356 mL | |
| 60 mM | 0.0312 mL | 0.1559 mL | 0.3119 mL | 0.7797 mL | |
| 80 mM | 0.0234 mL | 0.1170 mL | 0.2339 mL | 0.5848 mL |