Stemolecule™ SB431542

Catalog Size Price Quantity
04-0010 5 mg $99.00
04-0010-10 10 mg $168.00
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Structure of Stemolecule SB431542
Structure of Stemolecule SB431542

Product Overview

SB431542 is an inhibitor of the transforming growth factor-beta 1 (TGF-β1) activin receptor-like kinases (ALKs). It is a selective and potent inhibitor of ALK-4, -5 and -7. SB431542 inhibits endogenous activin and TGF-β signaling without affecting more divergent BMP signaling utilizing ALK-1, -2, -3, and -61,2. SB431542 stimulates proliferation, differentiation, and sheet formation of endothelial cells derived from embryonic stem cells3.

Also available: Stemolecule™ SB431542 in Solution (04-0010-05)

Product Specifications


5 mg (Cat. No. 04-0010)
10 mg (Cat. No. 04-0010-10)

Alternate Name


Chemical Formula


Molecular Weight


CAS Number

301836-41-9 (anhydrous)


Greater than 98% by HPLC analysis


White solid


Reconstitute in DMSO to the desired concentration. For reconstitution instructions please reference product specifications sheet.  

Storage and Stability

Store powder at 4°C protected from light. Following reconstitution, store aliquots at -20°C. Stock solutions are stable for 6 months when stored as directed. 

Quality Control

The purity of SB431542 was determined by HPLC analysis. The accurate mass was determined by mass spectrometry. Cellular toxicity of SB431542 was tested on mouse embryonic stem cells.


  1. Matsuyama, S., Iwadate, M., Kondo, M., Saitoh, M., Hanyu, A., Shimizu, K., Aburatani, H., Mishima, H.K., Imamura, T., Miyazono, K., Miyazawa, K. (2003) SB-431542 and Gleevec inhibit transforming growth factor-beta-induced proliferation of human osteosarcoma cells. Cancer Res. 63: 7791-7798.
  2. Laping, N.J., Grygielko, E., Mathur, A., Butter, S., Bomberger, J., Tweed, C., Martin, W., Fornwald, J., Lehr, R., Harling, J., Gaster, L., Callahan, J.F., and Olson, B.A. (2002) Inhibition of transforming growth factor (TGF)-beta1-induced extracellular matrix with a novel inhibitor of the TGF-beta type I receptor kinase activity: SB-431542. Mol Pharmacol 62: 58-64.
  3. Inman, G.J., Nicolás, F.J., Callahan, J.F., Harling, J.D., Gaster, L.M., Reith, A.D., Laping, N.J., and Hill, C.S. (2002) SB-431542 is a potent and specific inhibitor of transforming growth factor-beta superfamily type I activin receptor-like kinase (ALK) receptors ALK4, ALK5, and ALK7. Mol Pharmacol 62: 65-74.
  4. Watabe, T., Nishihara, A., Mishima, K., Yamashita, J., Shimizu, K., Miyazawa, K., Nishikawa, S., and Miyazono, K. (2003) TGF-beta receptor kinase inhibitor enhances growth and integrity of embryonic stem cell-derived endothelial cells. J Cell Biol. 163: 1303-1311.

Additional Publications

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