Home Tools
Log in

Pifithrin-α hydrobromide

Catalog No. T2707   CAS 63208-82-2
Synonyms: Pifithrin hydrobromide, PFTα hydrobromide, PFTα, Pifithrin-α, Pifithrin-α (PFTα) HBr

Pifithrin-α is a p53 inhibitor, inhibiting p53-dependent transactivation of p53-responsive genes.

All products from TargetMol are for Research Use Only. Not for Human or Veterinary or Therapeutic Use.
Pifithrin-α hydrobromide, CAS 63208-82-2
Pack Size Availability Price/USD Quantity
2 mg In stock $ 33.00
5 mg In stock $ 52.00
10 mg In stock $ 81.00
25 mg In stock $ 180.00
50 mg In stock $ 293.00
100 mg In stock $ 438.00
1 mL * 10 mM (in DMSO) In stock $ 54.00
Bulk Inquiry
Get quote
Select Batch  
Purity: 100%
Purity: 98.54%
Purity: 97.71%
Contact us for more batch information
Biological Description
Chemical Properties
Storage & Solubility Information
Description Pifithrin-α is a p53 inhibitor, inhibiting p53-dependent transactivation of p53-responsive genes.
Kinase Assay The ligand binding competition assays are performed. Cytosolic cell extracts from Hepa-1 cells are generated by the resuspension of the cell pellets in HEDG buffer [25 mM Hepes, 1 mM EDTA, 1 mM dithiothreitol, and 10% (v/v) glycerol, pH 7.5] containing 0.4 mM leupeptin, 4 mg/mL aprotinin, and 0.3 mM phenylmethylsulfonyl fluoride, homogenization, and centrifugation at 100,000 g for 45 min. Aliquots of the supernatant (120 μg) are incubated at room temperature for 2 h with the indicated concentrations of Pifithrin-α in the presence of 3 nM [3H]TCDD in HEDG buffer. After incubation on ice with hydroxyapatite for 30 min, HEDG buffer with 0.5% Tween 80 is added. The samples are centrifuged, washed twice, resuspended in 0.2 mL of scintillation fluid, and subjected to scintillation counting. Nonspecific binding is determined using a 150-fold molar excess of TCDF and subtracted from the total binding to obtain the specific binding. The specific binding is reported relative to [3H]TCDD alone[2].
Cell Research At the end of cell treatments, the number of attached cells is estimated by staining with 0.25% crystal violet in 50% methanol, followed by elution of the dye with 1% SDS. Optical density (530 nm) reflecting the number of stained cells is determined with a Bio-Tek EL311 microplate reader. Cell viability in suspension of short term culture of primary thymocytes is determined by their staining with 0.1% of methyl blue and microscopic counting of blue (dead) cells.(Only for Reference)
Synonyms Pifithrin hydrobromide, PFTα hydrobromide, PFTα, Pifithrin-α, Pifithrin-α (PFTα) HBr
Molecular Weight 367.3
Formula C16H18N2OS·HBr
CAS No. 63208-82-2


Powder: -20°C for 3 years | In solvent: -80°C for 2 years

Solubility Information

DMSO: 36.7 mg/mL (100 mM)

( < 1 mg/ml refers to the product slightly soluble or insoluble )

References and Literature

1. Komarov PG, et al. Science, 1999, 285(5434), 1733-1737. 2. Culmsee C, et al. J Neurochem, 2001, 77(1), 220-228. 3. Komarova EA, et al. J Biol Chem, 2003, 278(18), 15465-15468. 4. Murphy PJ, et al. J Biol Chem, 2004, 279(29), 320195-3201201. 5. Leker RR, et al. Exp Neurol, 2004, 187(2), 478-486. 6. Yu W, et al. Cyclosporine A Suppressed Glucose Oxidase Induced P53 Mitochondrial Translocation and Hepatic Cell Apoptosis through Blocking Mitochondrial Permeability Transition. Int J Biol Sci. 2016 Jan 1;12(2):198-209. 7. Kuang SQ, et al. FOXE3 mutations predispose to thoracic aortic aneurysms and dissections. J Clin Invest. 2016 Mar 1;126(3):948-61. 8. Lu L, Li K, Mao Y H, et al. Gold-chrysophanol nanoparticles suppress human prostate cancer progression through inactivating AKT expression and inducing apoptosis and ROS generation in vitro and in vivo[J]. International journal of oncology. 2017 Oct;51(4):1089-1103. 9. Zhou Y, Yang L, Xiong L, et al. KIF11 is upregulated in colorectal cancer and silencing of it impairs tumor growth and sensitizes colorectal cancer cells to oxaliplatin via p53/GSK3β signaling[J]. Journal of Cancer. 2021, 12(12): 3741.


1. Chen L, Zhang L, Jin G, et al.Synergy of 5-aminolevulinate supplement and CX3CR1 suppression promotes liver regeneration via elevated IGF-1 signaling.Cell Reports.2023, 42(8). 2. Lin X, Lin T, Wang X, et al.Sesamol serves as a p53 stabilizer to relieve rheumatoid arthritis progression and inhibits the growth of synovial organoids.Phytomedicine.2023: 155109. 3. Wu Y, Zhou T, Qian D, et al.Z-Guggulsterone Induces Cell Cycle Arrest and Apoptosis by Targeting the p53/CCNB1/PLK1 Pathway in Triple-Negative Breast Cancer.ACS Omega.2023 4. Hussain M, Lu Y, Tariq M, et al. A small-molecule Skp1 inhibitor elicits cell death by p53-dependent mechanism. Iscience. 2022, 25(7): 104591. 5. Yang R, Yang H, Wei J, et al. Mechanisms Underlying the Effects of Lianhua Qingwen on Sepsis-Induced Acute Lung Injury: A Network Pharmacology Approach. Frontiers in Pharmacology. 2021: 2839. 6. Wu X, Han C, Wang L, et al. Iron increases the susceptibility of colorectal cancer cells to compound Kushen Injection via the decrease of TOP2A and p53. Pharmacological Research-Modern Chinese Medicine. 2022, 2: 100058. 7. Luo Y, Gao X, Zou L, et al. Bavachin Induces Ferroptosis through the STAT3/P53/SLC7A11 Axis in Osteosarcoma Cells. Oxidative Medicine and Cellular Longevity. 2021 8. Guo Y, Li Q, Zhao G, et al. Loss of TRIM31 promotes breast cancer progression through regulating K48-and K63-linked ubiquitination of p53. Cell Death & Disease. 2021, 12(10): 1-13. 9. Shang Y, Zhang S, Cheng Y, et al. Tetrabromobisphenol a exacerbates the overall radioactive hazard to zebrafish (Danio rerio). Environmental Pollution. 2022: 120424. 10. Jiang W, Wang X, Su S, et al. Identifying the shared genes and KEGG pathways of Resolvin D1-targeted network and osteoarthritis using bioinformatics. Bioengineered. 2022, 13(4): 9839-9854

Related compound libraries

This product is contained In the following compound libraries:
PPI Inhibitor Library Cell Cycle Compound Library Apoptosis Compound Library Immunology/Inflammation Compound Library Target-Focused Phenotypic Screening Library Anti-Cancer Compound Library Anti-Colorectal Cancer Compound Library Anti-Cancer Metabolism Compound Library Anti-Lung Cancer Compound Library Kinase Inhibitor Library

Related Products

Related compounds with same targets
RO-5963 P53R3 Altholactone Quercetin 3-O-(6''-galloyl)-β-D-galactopyranoside Imbricatolic acid Pseudoginsenoside Rh2 Cryptomoscatone D2 Boehmenan

Dose Conversion

You can also refer to dose conversion for different animals. More

In vivo Formulation Calculator (Clear solution)

Step One: Enter information below
Average weight of animals
Dosing volume per animal
Number of animals
Step Two: Enter the in vivo formulation
% Tween 80
% ddH2O
Calculate Reset


Molarity Calculator
Dilution Calculator
Reconstitution Calculation
Molecular Weight Calculator

Molarity Calculator allows you to calculate the

  • Mass of a compound required to prepare a solution of known volume and concentration
  • Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Concentration of a solution resulting from a known mass of compound in a specific volume
See Example

An example of a molarity calculation using the molarity calculator
What is the mass of compound required to make a 10 mM stock solution in 10 ml of water given that the molecular weight of the compound is 197.13 g/mol?
Enter 197.13 into the Molecular Weight (MW) box
Enter 10 into the Concentration box and select the correct unit (millimolar)
Enter 10 into the Volume box and select the correct unit (milliliter)
Press calculate
The answer of 19.713 mg appears in the Mass box


Calculator the dilution required to prepare a stock solution

Calculate the dilution required to prepare a stock solution
The dilution calculator is a useful tool which allows you to calculate how to dilute a stock solution of known concentration. Enter C1, C2 & V2 to calculate V1.

See Example

An example of a dilution calculation using the Tocris dilution calculator
What volume of a given 10 mM stock solution is required to make 20ml of a 50 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=50 μM, V2=20 ml and V1 is the unknown:
Enter 10 into the Concentration (start) box and select the correct unit (millimolar)
Enter 50 into the Concentration (final) box and select the correct unit (micromolar)
Enter 20 into the Volume (final) box and select the correct unit (milliliter)
Press calculate
The answer of 100 microliter (0.1 ml) appears in the Volume (start) box


Calculate the volume of solvent required to reconstitute your vial.

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial.
Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Enter the chemical formula of a compound to calculate its molar mass and elemental composition

Tip: Chemical formula is case sensitive: C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed n the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.


Tech Support

Please see Inhibitor Handling Instructions for more frequently ask questions. Topics include: how to prepare stock solutions, how to store products, and cautions on cell-based assays & animal experiments, etc.


Pifithrin-α hydrobromide 63208-82-2 Apoptosis Immunology/Inflammation p53 Aryl Hydrocarbon Receptor Ferroptosis inhibit Pifithrin α hydrobromide Inhibitor MDM-2/p53 AhR Pifithrin Pifithrin hydrobromide PFTα hydrobromide PFTα Pifithrin-α Pifithrin-α (PFTα) HBr Pifithrinα hydrobromide inhibitor