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NST-628 Raf inhibitor

Name: NST-628
Brand: Selleck Chemicals
SKU: E1965
Availability: InStock
Rating: 5 (1 reviews)

Cat.No.E1965

NST-628 is a potent and well-tolerated single-agent inhibitor of both RAF and MEK. It acts as a pan-RAF–MEK molecular glue that blocks the phosphorylation and activation of MEK by RAF.

NST-628 Raf inhibitor Chemical Structure

Quality Control

Batch: E196501 DMSO]98 mg/mL]false]Water]Insoluble]false]Ethanol]Insoluble]false Purity: 98.36%

Cited in Nature Medicine for its top-tier quality
COA
NMR
HPLC
SDS/MSDS
Datasheet

98.36

Related Targets	ERK p38 MAPK JNK MEK Ras KRas S6 Kinase MAP4K TAK1 Mixed Lineage Kinase
Other Raf Inhibitors	LY3009120 Exarafenib (KIN-2787) GDC-0879 Avutometinib (Ro5126766, CH5126766) PLX-4720 AZ 628 SB590885 TAK-632 GW5074 RAF265 (CHIR-265)

Solubility

In vitro
Batch:

DMSO : 98 mg/mL (200.62 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

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	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.600mg/ml (1.23mM)	Taking the 1 mL working solution as an example, add 50 μL of 12 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of 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.	0.250mg/ml (0.51mM)	Taking the 1 mL working solution as an example, add 50 μL of 5 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

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.

Chemical Information, Storage & Stability

Molecular Weight	488.47	Formula	C₂₂H18F₂N₄O₅S	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	3002056-30-3	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent

Read more about storage stability stock solution CAS number

Mechanism of Action

Targets/IC₅₀/Ki	Raf MEK
References	[1] https://pubmed.ncbi.nlm.nih.gov/38588399/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-04-20)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT06326411	RECRUITING	Oncology; MEK Mutation; RAF Gene Mutation; Ras (KRAS or NRAS) Gene Mutation; Melanoma; NSCLC; Glioma; Solid Tumor, Adult; MAPK Pathway Gene Mutation	Nested Therapeutics, Inc	2024-04-09	PHASE1
NCT07784985	NOT_YET_RECRUITING	Glioma, Recurrent High Grade; Grade 4 Malignant Glioma	Nader Sanai	2026-10	EARLY_PHASE1

Tech Support

Handling Instructions

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