Name: CTB
Brand: Selleck Chemicals
SKU: E1107
Availability: InStock
Rating: 5 (1 reviews)

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Quality Control

Batch: Purity: 99.84%

99.84

Related Targets	HDAC JAK BET Histone Methyltransferase PKC PARP HIF PRMT EZH2 AMPK
Other Histone Acetyltransferase Inhibitors	PF-9363 (CTx-648) C646 MG149 Remodelin Hydrobromide WM-1119 YF-2 JQAD1 EML 425 CPTH2 WM-3835

Solubility

In vitro
Batch:

DMSO : 69 mg/mL (200.73 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 17 mg/mL

Water : 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.
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.	3.500mg/ml (10.18mM)	Taking the 1 mL working solution as an example, add 50 μL of 70 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.	3.500mg/ml (10.18mM)	Taking the 1 mL working solution as an example, add 50 μL of 70 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	343.73	Formula	C₁₆H₁₃ClF₃NO₂	Storage (From the date of receipt)	3 years -20°C powder
CAS No.	451491-47-7	--		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

In vitro	CTB effectively induces apoptosis, up-regulates the expression of P300, and increases the acetylation and total P53 protein levels in MCF-7 cells.
In vivo	CTB combinated with CpG, and aluminum hydroxide playsa synergistic effect to enhance ClfA_221-550-induced immune responses, which possesses the potential to develop a novel vaccine to prevent infection of S. aureus.
References	[1] https://pubmed.ncbi.nlm.nih.gov/21355420/ [2] https://pubmed.ncbi.nlm.nih.gov/23977652/ [3] https://pubmed.ncbi.nlm.nih.gov/32501144/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2025-12-18)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT07292636	NOT_YET_RECRUITING	CLASS II DIVISION 1 MALOCCLUSION; Class II Malocclusion; Growth; Overjet; Class II Buccal Segment Relationship; Class II Growth Modification; Distalization; Oral Health-Related Quality of Life	Aslam Alkadhimi	2026-03
NCT05433181	Not yet recruiting	SARS-CoV-2	University of Pennsylvania	2025-02	Phase 1\|Phase 2
NCT06593054	COMPLETED	Healthy	Pfizer	2024-07-29	PHASE1
NCT06344559	Not yet recruiting	Healthy	Rutgers The State University of New Jersey	2024-05-01	Not Applicable
NCT06347055	Not yet recruiting	Nicotine Dependence	University of Missouri-Columbia	2024-04-15	Not Applicable
NCT06301334	Not yet recruiting	Pain Mangement of Thoracotomy	Sohag University	2024-03-01	Not Applicable

Tech Support

Handling Instructions

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CTB Histone Acetyltransferase activator

Chemical Structure

Molecular Weight: 343.73