SML1046 Sigma-Aldrich


≥98% (HPLC)

Synonym: 6-[[2-[[4-(2,4-Dichlorophenyl)-5-(5-methyl-1H-imidazol-2-yl)-2-pyrimidinyl]amino]ethyl]amino]-3-pyridinecarbonitrile, CT99021




5, 25 mg in glass bottle


CHIR99021 has been used:
• in cocktail with small molecules to convert human lung fibroblast cells into neurons
• as a culture medium supplement in potassium supplemented simplex optimization medium (KSOM) for the culture of blastocysts
• for chronic inhibition of GSK-3 to investigate its role in corticogenesis

Biochem/physiol Actions

CHIR99021 is a very potent inhibitor of Glycogen synthase kinase 3 (GSK3, IC50 values for GSK3α and GSK3β = 10 and 6.7 nM, respectively). There is no cross-reactivity against CDKs. CHIR99201 potentiates self-renewal of human and mouse embryonic stem cells, and enhances reprogramming of somatic cells into stem cells.

General description

CHIR99021 is an aminopyrimidine derivative. CHIR99021 promotes self-renewal potential of embryonic stem cells (ESCs) of mice by inhibiting glycogen synthase kinase-3 (GSK-3) activity and potentiates the upregulation of β-catenin and c-Myc functions. CHIR99021 promotes self-renewal of ESCs by modulating transforming growth factor β (TGF-β), Notch and mitogen-activated protein kinases (MAPK) signaling pathways. CHIR99021 is an agonist of wingless/integrated (wnt) signalling, upregulates cyclinA expression and promotes cell proliferation in non-small-cell lung cancer (NSCLC) cell lines.

Safety & Documentation

Safety Information

GHS06  GHS06
Signal word 
Hazard statements 
Precautionary statements 
UN 2811 6.1 / PGIII
WGK Germany 


Certificate of Analysis

Protocols & Articles


3D Organoid Culture: New In Vitro Models of Development and Disease

Model systems drive biological research by recapitulating body processes and functions from the molecular to whole organism level. The human body is composed of both cellular and non-cellular materia...
Keywords: Adhesion, Cancer, Cell attachment, Cell culture, Cryopreservation, Diseases, Growth factors, Infectious Diseases, Processes and Functions, Vitamins

Naive Pluripotent Stem Cell Culture in an Inhibitor Based 2i/LIF Containing Serum-Free and Feeder-Free Stem Cell Media

Naive pluripotent stem cells are located within the epiblast of mature blastocysts. These primitive “ground-state” cells may be cultured in vitro using specialized media and small molecule inhibitors...
Gabi Tremml, Ming Li and Vi Chu1*,
1MilliporeSigma, Bioscience Division, Temecula, CA, USA
Keywords: Cell culture, Gene expression, Immunocytochemistry, Microscopy, Polymerase chain reaction, Polymerase chain reaction - quantitative, Transcription


Neural Stem Cell Culture Protocols

Introduction Methods     Isolation of Neural Stem Cells         Isolation of NSCs from Neural Tissue         Differentiation of Human iPSCs into NSCs         Characterization of Neural Stem Cells    ...
Keywords: AGE, Adhesion, Apoptosis, Cell culture, Central Nervous System, Cryopreservation, Culture media, Diseases, Growth factors, High performance liquid chromatography, Phase transitions, Phosphorylations, Purification

Peer-Reviewed Papers


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