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Stemolecule™ Thiazovivin


Brand: Stemolecule

Thiazovivin is a Rho-associated kinase (ROCK) inhibitor that protects human ESCs in the absence of ECM by regulating E-cadherin mediated cell-cell interaction. Also see ES Cell Cloning & Recovery Supplement – Thiazovivin (01-0014-500).

CAS Number: 1226056-71-8
Alternate Name(s):
  • N-benzyl-2-(pyrimidin-4-ylamino)thiazole-4-carboxamide


Product name Product code Pack size Price (USD) Price (GBP) Price (EUR)
Stemolecule™ Thiazovivin 04-0017 1 mg $ 255.00 £ 233.00 € 272.00

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Product Information

Thiazovivin is a selective, cell permeable small molecule that directly targets Rho-associated kinase (ROCK)1. In addition, Thiazovivin protects human embryonic stem cells (hESCs) in the absence of ECM by regulating E-cadherin mediated cell-cell interaction1. This observation suggests that Thiazovivin promotes cell survival. In other studies Thiazovivin, in combination with inhibitors of the TGFβ receptor and MEK pathway, has shown to improve reprogramming efficiency by more than 200-fold2.


Stemgent and the Stemolecule brand name are trademarks of REPROCELL Inc., Japan.

Product Name: Stemolecule Thiazovivin

Catalog Number: 04-0017

Size: 1 mg

Chemical Name: N-benzyl-2-(pyrimidin-4-ylamino)thiazole-4-carboxamide

Chemical Formula: C15H13N5OS

Molecular Weight: 311.36

CAS Number: 1226056-71-8

Purity: Greater than 98 % by HPLC analysis

Formulation: Light brown powder

Solubility: Thiazovivin is soluble in DMSO at 100 mM.

Reconstitution: For a 10 mM concentrated stock solution of Thiazovivin, reconstitute the compound by adding 321.2 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 thiazovivin.  As a general rule, cells in culture are sensitive to DMSO in the medium at 0.5% or less.

Storage and Stability: Store powder at 4 °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 Thiazovivin was determined by HPLC analysis. The accurate mass was determined by mass spectrometry. No acute cytotoxicity was observed in mouse embryonic stem cells following a 6 hour exposure to 1 nM — 100 µM of Thiazovivin.

Specification Sheets:

Safety Data Sheets:

  1. Xu, Y., Zhu, X., Hahm, H.S., Wei, W., Hao, E., Hayek, A., and Ding, S. Revealing a core signaling regulatory mechanism for pluripotent stem cell survival and self-renewal by small molecules. Proc Natl Acad Sci USA 107: 8129-8134 (2010).
  2. Lin, T., Ambasudhan, R., Yuan, X., Li, W., Hilcove, S., Abujarour, R., Lin, X., Hahm, H.S., Hao, E., Hayek, A., and Ding, S. A chemical platform for improved induction of human iPSCs. Nat Methods 6: 805-808 (2009).

Additional Publications