Stemolecule™ XAV939


Brand: Stemgent™

Purchase product: USA Store

Product Code Pack Size Price in
The Americas
Price in EMEA
04-0046 2 mg USD $ 199.00 GBP £ 194.32 EUR € 220.56

Prices do not include shipping and handling charges.


Stemolecule XAV939 is a cell-permeable small molecule inhibitor of the Wnt / β-catenin pathway. XAV939 inhibits tankyrase 1 and tankyrase 2, thus stabilizing axin and stimulating β-catenin degradation1. Current research suggests that Wnt proteins act to maintain stem cells in an undifferentiated, self-renewing state2. Wnt proteins act on a variety of stem cells that include neural, mammary and embryonic stem cells. In addition, XAV939 inhibits growth of DLD-1 cells, an APC-deficient colorectal cancer cell line1.


Product Name: Stemolecule XAV939

Catalog Number: 04-0046

Size: 2 mg

Alternate Name(s): 2-(4-(trifluoromethyl)phenyl)-7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidin-4-ol

Chemical Formula: C14H11F3N2OS

Molecular Weight: 312.31

CAS Number: 284028-89-3

Purity: Greater than 95 % by HPLC analysis

Formulation: White powder

Solubility: XAV939 is reported to be soluble in DMSO at 100 mM.

Reconstitution: For a 10 mM concentrated stock solution of XAV939, reconstitute the compound by adding 640.4 µL of DMSO to the entire contents of the vial. If precipitate is observed, warm the solution to 37 °C for 2 to 5 minutes. For use in cell culture, warm the media prior to adding reconstituted compound. Note: for most cells, the maximum tolerance to DMSO is less than 0.5%. 

Storage and Stability: Store powder at −20 °C protected from light. Information about the stability of Stemolecules in solution is largely not available. As a general guideline, we recommend that stock solution be freshly made and stored in aliquots at −20 °C, protected from light. The effect of storage of stock solutions should be verified for each application.

Quality Control: The purity of XAV939 is determined by HPLC analysis. The molecular weight is determined by mass spectrometry. No acute cytotoxicity is observed in mouse embryonic stem cells following a 6 hour exposure to 1 nM — 100 uM of XAV939.


  1. Huang, S.M., Mishina, Y.M., Liu, S., Cheung, A., Stegmeier, F., Michaud, G.A., Charlat, O., Wiellette, E., Zhang, Y., Wiessner, S., Hild, M., Shi, X., Wilson, C.J., Mickanin, C., Myer, V., Fazal, A., Tomlinson, R., Serluca, F., Shao, W., Cheng, H., Schultz, M., Rau, C., Schirle, M., Schlegl, J., Ghidelli, S., Fawell, S., Lu, C., Curtis, D., Kirschner, M.W., Lengauer, C., Finan, P.M., Tallarico, J.A., Bouwmeester, T., Porter, J.A., Bauer, A., and Cong, F. Tankyrase inhibition stabilizes axin and antagonizes Wnt signaling. Nature 461: 614-620 (2009)
  2. Nusse, R. Wnt signaling and stem cell control. Cell Research 18: 523-527 (2008).

Additional Publications