Tofacitinib citrate

≥98% (HPLC)

Tasocitinib citrate salt, CP-690550-10, 3-[(3R,4R)-4-Methyl-3-[methyl-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]piperidin-1-yl]-3-oxopropanenitrile citrate salt, (3R,4R)-4-Methyl-3-(methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-β-oxo-1-piperidinepropanenitrile citrate salt
Empirical Formula (Hill Notation):
C16H20N6O · C6H8O7
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

Quality Level


≥98% (HPLC)






white to beige


DMSO: 5 mg/mL (clear solution; warmed)



storage temp.

room temp

SMILES string




InChI key


Gene Information

Related Categories

General description

Tofacitinib is a synthetic molecule corresponding to a molecular weight of 312.4 Da and is permeable by transcellular diffusion.


Tofacitinib citrate has been used:
  • as a ligand for human serum albumin in fluorescence quenching, dynamic light scattering (DLS) measurements, differential scanning calorimetry and molecular docking studies
  • as a medium supplement for full depth articular cartilage (FDC) explants to monitor cytokine-induced proteoglycan loss
  • as a Janus kinase inhibitor in MCF7 breast cancer cells


5, 25 mg in glass bottle

Biochem/physiol Actions

Tofacitinib is a potent inhibitor of Janus kinase 3 (JAK3) with some JAK-1 inhibitory activity as well. It blocks downstream STAT signaling resulting in potent inhibition of inflammatory cytokines with resultant immunosuppressive and anti-inflammatory activity. Tofacitinib is being investigated for for several autoimmune disorders including, rheumatoid arthritis, psoriasis and dry eye.

Features and Benefits

This compound is a featured product for Kinase Phosphatase Biology research. Click here to discover more featured Kinase Phosphatase Biology products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.

Other Notes

This compound was developed by Pfizer for Kinase Phosphatase Biology research. To learn more about Sigma′s partnership with Pfizer and view other authentic, high-quality Pfizer compounds, visit sigma.com/bsm-pfizer.

To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.
Tofacitinib has been expertly reviewed and recommended by the Chemical Probes Portal. For more information, please visit the Tofacitinib probe summary on the Chemical Probes Portal website.

Legal Information

Sold for research purposes under agreement from Pfizer Inc.
Pfizer is a registered trademark of Pfizer, Inc.


13 - Non Combustible Solids

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Tofacitinib and TPCA-1 exert chondroprotective effects on extracellular matrix turnover in bovine articular cartilage ex vivo
Kjelgaard-Petersen CF, et al.
Biochemical Pharmacology (2018)
Usir S Younis et al.
AAPS PharmSciTech, 20(5), 167-167 (2019-04-18)
Preformulation studies on tofacitinib citrate, a small molecule JAK3 specific inhibitor, have not been previously reported in literature. We therefore conducted several preformulation studies on tofacitinib citrate, and its free base, to better understand factors that affect its solubility, stability...
Sung Hun Bae et al.
Pharmaceutics, 12(8) (2020-08-06)
Tofacitinib is a Jak inhibitor developed as a treatment for rheumatoid arthritis. Tofacitinib is metabolized mainly through hepatic CYP3A1/2, followed by CYP2C11. Rheumatoid arthritis tends to increase renal toxicity due to drugs used for long-term treatment. In this study, pharmacokinetic...
Binding of Janus kinase inhibitor tofacitinib with human serum albumin: multi-technique approach
Abdelhameed AS, et al.
Journal of Biomolecular Structure & Dynamics, 34(9), 2037-2044 (2016)
Ben X Wang et al.
Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research, 37(4), 147-152 (2017-04-08)
Aicardi-Goutières syndrome (AGS) is an early-onset, genetic disease characterized by recurrent fever, multifocal lesions of the brain, and systemic autoimmunity. We report on 3 AGS patients, 2 siblings with an RNASEH2A gene mutation and 1 patient with a SAMHD1 gene...
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