Support & Resources


DAPI, Dilactate

DAPI dilactate is essentially the same as DAPI dihydrochloride (catalog no. 40011) but with a different counterion for improved water solubility.

Product Attributes

Cellular localization


For live or fixed cells

For fixed cells, For live/intact cells

Assay type/options

DNA content/cell cycle (flow cytometry), Long term staining (24-72h), No-wash staining, Real-time imaging

Cell permeability

Membrane permeant

Apoptosis/viability marker

All cell stain




358/461 nm (with DNA)

Catalog #
10 mg
Clear selection
Add to wishlist
(Please select quantity above )

Wishlist updated! View wishlist

Shipping, Handling & Tax (CA only) not included in price. Learn more

Tax is assessed in the state of California. All fees will be calculated during checkout based on your shipping information and are subject to change.

SPECIAL - Order 5 or more and receive 10% off.

Request a Bulk Quote


Product Description

DAPI dilactate is essentially the same as DAPI dihydrochloride (catalog no. 40011), but with a different counterion. The dilactate salt form of the dye is more water soluble than the dihydrochloride salt, and therefore DAPI dilactate is a better choice for preparing stock solutions in water.

DAPI is a popular blue DNA dye that is used as a nuclear counterstain in fluorescence microscopy, chromosome staining and flow cytometry. The dye binds to the minor groove of dsDNA with approximately 20-fold fluorescence enhancement, with higher affinity for A-T rich regions.

DAPI can be used to stain live bacteria (gram-positive and gram-negative) but in live yeast the staining is weak and not nuclear. See our Cellular Stains Table for more information on how our dyes stain various organisms.

Product Features:

  • Classic blue nuclear counterstain for fixed cells
  • Can be used at higher concentrations to stain live cells
  • λExEm(DNA) = 358/461 nm
  • Yellow solid soluble in water
  • Store at 4°C and protect from light, especially in solution
  • C22H27N5O6
  • MW: 457.49

Learn more about DAPI and our novel nuclear stains. We also offer antifade mounting media containing DAPI, in both hardset and wetset formulations.

DAPI Products


Unit Size

Catalog Number

DAPI10 mg40011
DAPI in H2O, 10 mg/mL1 mL40043
DAPI, dilactate10 mg40009




You may also like…