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Product Type
Accessory Reagent
Product Code Applications Pack Size List Price Quantity
250 µg

DAPI is a cell permeable fluorescent compound (MW 350.3) that is able to stain the DNA of eukaryotic and prokaryotic cells by binding with high affinity to the minor groove of AT-rich DNA sequences. When DAPI is bound to DNA and excited by an ultraviolet light source, blue fluorescent emission can be detected with maximum emission at at 461 nm. PureBlu DAPI has a characteristic Stokes shift of approximately 100 nm, which makes this dye an optimal choice when good spectral separation is desired. PureBlu DAPI is compatible with fixed and unfixed cells.

Product Details

1. Reconstitute one vial of lyophilized PureBlu DAPI Dye with 500 μl of de-ionized water, then vortex briefly to make 100x stock solution.

2. Dilute the 100x stock solution 1:100 with 1x phosphate buffered saline to make a 1 μg/ml staining solution.
Reagents in the Kit
5 vials, 50 μg each, DAPI nuclear staining dye powder

Storage Information

Prior to reconstitution store at - 20oC
After reconstitution store at +4oC or at -20oC if preferred
This product is photosensitive and should be protected from light. PureBlu™ DAPI Dye is stable for 12 months from date of reconstitution if stored at - 20oC or 6 months at 2-8oC.
Guaranteed until date of expiry. Please see product label.

More Information

For research purposes only

Applications of PUREBLU™ DAPI

This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
Application Name Verified Min Dilution Max Dilution
Flow Cytometry 1/500
Immunofluorescence 1/500
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
Instructions For Use
Note: The optimal concentration for different cell types should be determined empirically.

1. Culture cells of interest under appropriate conditions.

2. Rinse cells with 1x phosphate buffered saline.

3. Optional: Fix cells with 3.7% formaldehyde at room temperature (18-25oC) for 10 minutes.

4. Optional: Rinse cells with 1x phosphate buffered saline and permeabilize with 0.1% Triton x-100 in phosphate buffered saline at room temperature (18-25oC) for 5 minutes.

5. Rinse cells with 1x phosphate buffered saline.

6. Stain with 1x staining solution at room temperature (18-25oC) for 15 minutes.

7. Rinse cells with 1x phosphate buffered saline.

8. Optional: Remove phosphate buffered saline and mount cells in antifade-mounting media.

9. Image cells.

Triton is a trademark of Dow Chemical Company.

Product Specific References

References for PUREBLU™ DAPI

  1. She, D.T. et al. (2018) SIRT2 Inhibition Confers Neuroprotection by Downregulation of FOXO3a and MAPK Signaling Pathways in Ischemic Stroke.
    Mol Neurobiol. 55 (12): 9188-203.
  2. Carter-Timofte, M.E. et al. (2021) Antiviral Potential of the Antimicrobial Drug Atovaquone against SARS-CoV-2 and Emerging Variants of Concern.
    ACS Infect Dis. acsinfecdis.1c00278.
  3. Earnest, K.G. et al. (2021) Development and characterization of a DNA aptamer for MLL-AF9 expressing acute myeloid leukemia cells using whole cell-SELEX.
    Sci Rep. 11 (1): 19174.

Fluorescent Spectraviewer

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How to Use the Spectraviewer

Watch the Tool Tutorial Video ▸
  • Start by selecting the application you are interested in, with the option to select an instrument from the drop down menu or create a customized instrument
  • Select the fluorophores or fluorescent proteins you want to include in your panel to check compatibility
  • Select the lasers and filters you wish to include
  • Select combined or multi-laser view to visualize the spectra