WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 510241

CAS#: 549505-65-9

Description: ML3403 is a potent and selective p38 MAP kinase inhibitor. ML3403 has potent anti-inflammatory activity in airway smooth muscle.

Chemical Structure

CAS# 549505-65-9

Theoretical Analysis

MedKoo Cat#: 510241
Name: ML3403
CAS#: 549505-65-9
Chemical Formula: C23H21FN4S
Exact Mass: 404.1471
Molecular Weight: 404.5
Elemental Analysis: C, 68.29; H, 5.23; F, 4.70; N, 13.85; S, 7.93

Size Price Shipping out time Quantity
10mg USD 430 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-02-26. Prices are subject to change without notice.

ML3403, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Synonym: ML3403; ML-3403; ML 3403.

IUPAC/Chemical Name: 4-(5-(4-fluorophenyl)-2-(methylthio)-1H-imidazol-4-yl)-N-(1-phenylethyl)pyridin-2-amine


InChi Code: InChI=1S/C23H21FN4S/c1-15(16-6-4-3-5-7-16)26-20-14-18(12-13-25-20)22-21(27-23(28-22)29-2)17-8-10-19(24)11-9-17/h3-15H,1-2H3,(H,25,26)(H,27,28)


white solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO, not in water

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:

Handling Instructions:

Preparing Stock Solutions

The following data is based on the product molecular weight 404.5 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

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1: Koch DA, Silva RB, de Souza AH, Leite CE, Nicoletti NF, Campos MM, Laufer S, Morrone FB. Efficacy and gastrointestinal tolerability of ML3403, a selective inhibitor of p38 MAP kinase and CBS-3595, a dual inhibitor of p38 MAP kinase and phosphodiesterase 4 in CFA-induced arthritis in rats. Rheumatology (Oxford). 2013 Nov 15. [Epub ahead of print] PubMed PMID: 24241037.

2: Munoz L, Ramsay EE, Manetsch M, Ge Q, Peifer C, Laufer S, Ammit AJ. Novel p38 MAPK inhibitor ML3403 has potent anti-inflammatory activity in airway smooth muscle. Eur J Pharmacol. 2010 Jun 10;635(1-3):212-8. doi: 10.1016/j.ejphar.2010.02.037. Epub 2010 Mar 9. PubMed PMID: 20226180.

3: Kammerer B, Scheible H, Zurek G, Godejohann M, Zeller KP, Gleiter CH, Albrecht W, Laufer S. In vitro metabolite identification of ML3403, a 4-pyridinylimidazole-type p38 MAP kinase inhibitor by LC-Qq-TOF-MS and LC-SPE-cryo-NMR/MS. Xenobiotica. 2007 Mar;37(3):280-97. PubMed PMID: 17624026.

4: Kammerer B, Scheible H, Albrecht W, Gleiter CH, Laufer S. Pharmacokinetics of ML3403 ({4-[5-(4-fluorophenyl)-2-methylsulfanyl-3H-imidazol-4-yl]-pyridin-2-yl}-(1-pheny lethyl)-amine), a 4-Pyridinylimidazole-type p38 mitogen-activated protein kinase inhibitor. Drug Metab Dispos. 2007 Jun;35(6):875-83. Epub 2007 Mar 7. PubMed PMID: 17344341.

Additional Information