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SB431542 TGF-beta/Smad inhibitor

Cat.No.S1067

SB431542 is a potent and selective inhibitor of ALK5 with IC50 of 94 nM in a cell-free assay, 100-fold more selective for ALK5 than p38 MAPK and other kinases.

SB431542 TGF-beta/Smad inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 384.39

Quality Control

Batch: Purity: 99.99%

99.99

Related Targets	PKC ROCK Bcr-Abl
Other TGF-beta/Smad Inhibitors	RepSox (E-616452) Vactosertib (TEW-7197) A-83-01 LDN-193189 Dihydrochloride Galunisertib (LY2157299) SRI-011381 (C381) LY2109761 SIS3 Hydrochloride SB-525334 LY364947

Solubility in DMSO or Water

In vitro
Batch:

DMSO : 77 mg/mL (200.31 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 3 mg/mL

Water : Insoluble

The solubility data above are all experimental results (not literature values).

DMSO : 13 mg/mL (33.81 mM) Warmed with 60°C water bath; Ultrasonicated;
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 3 mg/mL

Water : Insoluble

The solubility data above are all experimental results (not literature values).

DMSO : 10 mg/mL (26.01 mM) Warmed with 60°C water bath; Ultrasonicated;
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

The solubility data above are all experimental results (not literature values).

DMSO : 100 mg/mL (260.15 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 5 mg/mL

Water : Insoluble

The solubility data above are all experimental results (not literature values).

DMSO : 77 mg/mL (200.31 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 9 mg/mL

Water : Insoluble

The solubility data above are all experimental results (not literature values).

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	0.1%DMSO 1 99.80% Saline Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.020mg/ml (0.05mM)	Taking the 1 mL working solution as an example, add 1 μL of 20 mg/ml clear DMSO stock solution to 998 μL of Saline and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG 300 2 5%Tween80 3 50% ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	4.000mg/ml (10.41mM)	Taking the 1 mL working solution as an example, add 50 μL of 80 mg/mL clarified DMSO stock solution to 400 μL PEG300, mix evenly to clarify it; add 50 μL Tween-80 to the above system, mix evenly to clarify it; then Continue to add 500 μL ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5%DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	4.000mg/ml (10.41mM)	Taking the 1 mL working solution as an example, add 50 μL of 80 mg/mL clarified DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Read more about SB431542 solubility in DMSO or water

Working Concentrations for Cell Culture Treatment

Read more about SB431542 working concentrations for cell culture treatment

Working Concentrations for Animal Model Treatment

Mechanism of Action

Information

SB431542 is a potent, highly selective, and ATP-competitive TGF-beta type I receptor kinase (ALK4/5/7) inhibitor. It works by blocking the receptor kinase activity, preventing the phosphorylation of Smad2/3 and disrupting downstream TGF-beta/Smad signaling. This effectively suppresses epithelial-mesenchymal transition, fibrosis, and cancer metastasis, showing significant application value in stem cell differentiation and regenerative medicine.

Primary Applications and Mechanism of Action

Read more about SB431542 Mechanism of Action

Chemical Information, Storage & Stability

Molecular Weight	384.39	Formula	C₂₂H₁₆N₄O₃	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	301836-41-9	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	C1OC2=C(O1)C=C(C=C2)C3=C(NC(=N3)C4=CC=C(C=C4)C(=O)N)C5=CC=CC=N5

Read more about storage & stability

SB431542 VS RepSox (E-616452) | Galunisertib (LY2157299) | A-83-01

Read more comparative analysis about SB431542

Tech Support

Handling Instructions

Tel: +1-832-582-8158 Ext:3

If you have any other enquiries, please leave a message.

Frequently Asked Questions

Question 1:
I would appreciate it if you can help me in figuring out the formulation for it in vivo experiments.

Answer:
S1067 in 1% DMSO+30% polyethylene glycol+1% Tween 80 at 30 mg/ml is a suspension for oral gavage. It can also be dissolved in 2% DMSO+30% PEG 300+ddH2O at 5 mg/ml as a clear solution for IP injection.

Dilution Calculator

Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:

Concentration _(start) x Volume _(start) = Concentration _(final) x Volume _(final)

This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )

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

The Serial Dilution Calculator Equation

Serial Dilutions

Concentration (start):

Dilution-folds:

Computed Result

C1=C0/X	C1:		LOG(C1):
C2=C1/X	C2:		LOG(C2):
C3=C2/X	C3:		LOG(C3):
C4=C3/X	C4:		LOG(C4):
C5=C4/X	C5:		LOG(C5):
C6=C5/X	C6:		LOG(C6):
C7=C6/X	C7:		LOG(C7):
C8=C7/X	C8:		LOG(C8):