All Photos(2)



bisBenzimide H 33342 trihydrochloride

for fluorescence, ≥97.0% (HPLC)

Hoechst 33342, HOE 33342, bisBenzimide, 2′-(4-Ethoxyphenyl)-5-(4-methyl-1-piperazinyl)-2,5′-bi-1H-benzimidazole trihydrochloride
Empirical Formula (Hill Notation):
C27H28N6O · 3HCl · xH2O
CAS Number:
Molecular Weight:
561.93 (anhydrous basis)
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


for fluorescence


≥97.0% (HPLC)


λex 340 nm; λem 510 nm
λex 355 nm; λem 465 nm in TE buffer; DNA

storage temp.


SMILES string




InChI key


Looking for similar products? Visit Product Comparison Guide


bisBenzimide H 33342 trihydrochloride can be used to study biochemicals and reagents, fluorescent probes, labels, particles and stains, luminescent compounds and detection and wavelength index. bisBenzimide H 33342 trihydrochloride, Hoechst 33342, has been used in a study to investigate the effects of inorganic and organic arsenic compounds on human T-lymphoblastoid leukemia cells. Hoechst 33342 has also been used in a study to examine the effects of 9 calcium antagonists on ABCG2/BCRP-mediated resistance and transport in HeLa and SN-38-resistant HeLa (HeLa/SN100) cells, overexpressing ABCG2/BCRP.
Useful for staining DNA, chromosomes and nuclei. May be used for fluorescence microscopy or flow cytometry.
Excitation max. = 346 nm
Emission max. = 460 nm

Biochem/physiol Actions

Membrane-permeable, fluorescent DNA stains with low cytotoxicity that intercalate in A-T regions of DNA.


Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Suitable for vital DNA staining of a variety of cell types; As a probe of membrane permeability in mammalian cells

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. What is the solubility of Product 14533, bisBenzimide H 33342 trihydrochloride?

    It is soluble in water at 50 mg/mL.  It will precipitate from phosphate buffer solutions

  4. When Product 14533, bisBenzimide H 33342 trihydrochloride, is dissolved in water, what is the pH?

    The pH of a 2% solution in water is approximately 1.9.

  5. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  6. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  7. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

M J Lydon et al.
Journal of cellular physiology, 102(2), 175-181 (1980-02-01)
A procedure has been investigated for sorting viable cells according to their DNA content. Cells are stained with the U.V. activated fluorochromes 4'6-diamidino-2-phenylindole (DAPI), Hoechst 33258 or Hoechst 33342, and sorted with a Fluorescence Activated Cell Sorter. Hoechst 33342 is...
W M Grogan et al.
The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society, 29(6), 738-746 (1981-06-01)
The dye Hoechst 33342 and a 2-parameter cell sorter have been used to measure DNA content in viable testis cells and to sort pachytene spermatocytes and round spermatids from adult mouse testis to virtually 100% homogeneity. Early diploid spermatogenic cells...
M E Lalande et al.
Proceedings of the National Academy of Sciences of the United States of America, 78(1), 363-367 (1981-01-01)
Flow cytometric analysis of the uptake of the DNA-specific and fluorescent probe Hoechst 33342 (HO342) offers a simple and rapid method for measuring membrane transport rates in mammalian cells and identifying cellular subpopulations that differ in their membrane transport rates....
Steven S Welc et al.
Nature communications, 10(1), 2788-2788 (2019-06-28)
Many potentially therapeutic molecules have been identified for treating Duchenne muscular dystrophy. However, targeting those molecules only to sites of active pathology is an obstacle to their clinical use. Because dystrophic muscles become extensively inflamed, we tested whether expressing a therapeutic...
Ganna Aleshcheva et al.
FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 29(6), 2303-2314 (2015-02-15)
Real and simulated microgravity induce a variety of changes in human cells. Most importantly, changes in the cytoskeleton have been noted, and studies on microtubules have shown that they are gravisensitive. This study focuses on the effects of short-term real...

Related Content

DNA Detection

Nancy-520 for DNA Detection and Quantitation

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service