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Nafamostat Mesylate
Activators & Inhibitors
Chemical Modulators

Nafamostat Mesylate #38695

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Nafamostat Mesylate: Image 1
Chemical structure of Nafamostat Mesylate.

Product Usage Information

Nafamostat Mesylate is supplied as a lyophilized powder. For a 15 mM stock, reconstitute 10 mg of powder in 1.23 ml of DMSO. Working concentrations and length of treatment can vary depending on the desired effect.


Store lyophilized at room temperature, desiccated. In lyophilized form, the chemical is stable for 24 months. Once in solution, store at 4ºC and use within 1 month or at -80ºC and use within 6 months to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Product Description

Molecular Weight 539.6 g/mol
Purity >98%
Molecular Formula C19H17N5O2 • 2CH3SO3H
CAS 82956-11-4
Solubility Soluble in DMSO at 50 mg/ml or water at 50 mg/ml.


Nafamostat Mesylate, also known as FUT-175, is a potent and reversible, broad-spectrum serine protease inhibitor of trypsin (Ki = 15 nM), tryptase (Ki = 95.3 pM), and other additional proteases (1). This small compound has been identified as a key player in the disruption of the inflammatory response via inhibition of the complement system and coagulation cascade (2). Its wide range of inhibitory activity displays anti-cancer and anti-viral properties and has shown effective inhibition of MERS-CoV by preventing membrane fusion, making it a promising therapeutic candidate against the 2019-nCoV infection (EC50 = 22.50 μM) (3,4).
  1. Mori, S. et al. (2003) J Pharmacol Sci 92, 420-3.
  2. Aoyama, T. et al. (1984) Jpn J Pharmacol 35, 203-27.
  3. Chen, X. et al. (2019) Front Oncol 9, 852.
  4. Wang, M. et al. (2020) Cell Res 30, 269-71.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
To Purchase # 38695
Cat. # Size Qty. Price
10 mg
$ 80