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14530

Sigma-Aldrich

bisBenzimide H 33258

for fluorescence, ≥98.0% (HPLC)

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Synonym(s):
2′-(4-Hydroxyphenyl)-5-(4-methyl-1-piperazinyl)-2,5′-bi(1H-benzimidazole) trihydrochloride, 2-[2-(4-Hydroxyphenyl)-6-benzimidazoyl]-6-(1-methyl-4-piperazyl)benzimidazole trihydrochloride, BBIH, BXI-72, HOE 33258, Hoechst 33258, NSC334072
Empirical Formula (Hill Notation):
C25H24N6O · 3HCl
CAS Number:
Molecular Weight:
533.88
Beilstein:
4088183
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.32

grade

for fluorescence

Quality Level

Assay

≥98.0% (HPLC)

form

powder

solubility

water and ethanol: 10 mg/mL
H2O: soluble
ethanol: soluble

fluorescence

λex 338 nm; λem 505 nm (pH 7.0)
λex 355 nm; λem 465 nm in TE buffer; DNA

storage temp.

2-8°C

SMILES string

Cl[H].Cl[H].Cl[H].[H]O[H].CN1CCN(CC1)c2ccc3NC(=NCc3c2)c4ccc5NC(=NCc5c4)c6ccc(O)cc6

InChI

1S/C27H28N6O.3ClH.H2O/c1-32-10-12-33(13-11-32)22-5-9-25-21(15-22)17-29-27(31-25)19-4-8-24-20(14-19)16-28-26(30-24)18-2-6-23(34)7-3-18;;;;/h2-9,14-15,34H,10-13,16-17H2,1H3,(H,28,30)(H,29,31);3*1H;1H2

InChI key

OWRSPPSBNWJJAR-UHFFFAOYSA-N

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This Item
B2883B1155B2261
bisBenzimide H 33258 for fluorescence, ≥98.0% (HPLC)

14530

bisBenzimide H 33258

bisBenzimide H 33258 ≥98% (HPLC and TLC)

B2883

bisBenzimide H 33258

bisBenzimide H 33258 powder, BioReagent, suitable for cell culture, ≥98% (HPLC and TLC)

B1155

bisBenzimide H 33258

form

powder

form

powder

form

powder

form

powder

storage temp.

2-8°C

storage temp.

−20°C

storage temp.

−20°C

storage temp.

−20°C

solubility

water and ethanol: 10 mg/mL, ethanol: soluble, H2O: soluble

solubility

H2O: 10 mg/mL, water and ethanol: 10 mg/mL, phosphate buffer: precipitates

solubility

H2O: 10 mg/mL, water and ethanol: 10 mg/mL

solubility

H2O: 20 mg/mL, phosphate buffer: precipitates

grade

for fluorescence

grade

-

grade

-

grade

-

fluorescence

λex 338 nm; λem 505 nm (pH 7.0)

fluorescence

-

fluorescence

-

fluorescence

-

Application

A bibenzimidazole dye that has been utilized as a fluorescent stain. It is membrane-permeable and selectively binds to adenine-thymine regions in the minor groove of B-form DNA with a high binding constant, making it a useful stain for DNA, chromosomes, and nuclei . It has been shown that the fluorescence is relatively insensitive to the presence of various solution reagents (i.e., BSA, RNA, Tris, sucrose, TEA/EDTA, Triton X-100, and SDS). Furthermore, the solution ionic strength and pH has been shown to be independent of the Stokes′ shift of bisBenzimide H 33258 . The properties of this dye make it useful in several applications such as detecting mycoplasma contamination in tissue culture , indicating early onset of apoptosis, sorting living cells based on DNA content, and acting as a probe for DNA-Drug interactions. Utilized in the design and development of a fluorimetric assay to quantitate cell numbers in microtiter plates. The methodology of the assay is based on Hoechst 33258 binding to DNA and is sensitive for a thousand cells. One application of this is assay is the normalization of ELISA data. The illumination of Hoechst 33253 coupled with Merocyanine 540 can be utilized as an effective method to eradicate bacterial infections (i.e., A. laidlawii contaminated corneal endothelial cell cultures) . BisBenzimide H 33258 is commonly used in many established staining protocols (David M. Terrian, Cancer Cell Signaling – Methods and Protocols,
Springer, Volume 218 ).
bisBenzimide H 33258 is useful for staining DNA, chromosomes and nuclei. bisBenzimide H 33258 may be used for fluorescence microscopy or flow cytometry.
Excitation max. = 346 nm
Emission max. = 460 nm

Biochem/physiol Actions

bisBenzimide H 33258 is a potent and selective Bcl-XL inhibitor. bisBenzimide H 33258 is a membrane-permeable, fluorescent DNA stain with low cytotoxicity that intercalate in A-T regions of DNA.

Other Notes

Useful reagent for cytogenetic studies; for the fluorescent staining of DNA in cells; simple two-step fluorimetric assay of DNA in isolated nuclei, cell extracts, or crude homogenates using Hoechst 33258

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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R Jin et al.
Proceedings of the National Academy of Sciences of the United States of America, 85(23), 8939-8942 (1988-12-01)
We compare the fluorescence properties of bisbenzimide (also known as Hoechst 33258) bound to the minor groove of the poly[d(AT)].poly[d(AT)] duplex with the corresponding fluorescence properties of bisbenzimide dissolved in neat organic solvents and mixed organic/aqueous solvents. Based on these
M Tarshis et al.
Journal of immunological methods, 168(2), 245-252 (1994-02-10)
Mycoplasma infection can substantially affect the biological properties of cells in vitro. We have devised a method for the selective killing of mycoplasmas, e.g., A. laidlawii, M. fermentans, M. hyorhinis and M. arginini, from experimentally infected cell cultures. This approach
Improved microfluorometric DNA determination in biological material using 33258 Hoechst.
C F Cesarone et al.
Analytical biochemistry, 100(1), 188-197 (1979-11-15)
Fluorometric properties of the bibenzimidazole derivative Hoechst 33258, a fluorescent probe specific for AT concentration in chromosomal DNA.
B Weisblum et al.
Chromosoma, 46(3), 255-260 (1974-01-01)
Y J Kim et al.
Analytical biochemistry, 174(1), 168-176 (1988-10-01)
A simple two-step fluorometric assay of DNA in cartilage explants, utilizing the bisbenzimidazole dye Hoechst 33258, is described. Cartilage explants were prepared for assay by digestion with papain. Aliquots of the digest were mixed with dye solution, and the fluorescence

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