Name: Eltrombopag Olamine
Brand: Selleck Chemicals
SKU: S2229
Availability: InStock
Rating: 5 (20 reviews)

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Quality Control

Batch: Purity: 99.99%

99.99

Related Targets	PD-1/PD-L1 CXCR STING AhR Immunology & Inflammation related CD markers Interleukins Anti-infection Antioxidant COX
Other TpoR Inhibitors	Butyzamide

Solubility

In vitro
Batch:

DMSO : 89 mg/mL (157.62 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.
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.	7.500mg/ml (13.28mM)	Taking the 1 mL working solution as an example, add 50 μL of 150 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.

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

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% DMSO

%

% Tween 80

% ddH₂O

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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	564.63	Formula	C₂₉H₃₆N₆O₆	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	496775-62-3	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	SB497115，SB-497115-GR			SMILES	CC1=C(C=C(C=C1)N2C(=O)C(=C(N2)C)N=NC3=CC=CC(=C3O)C4=CC(=CC=C4)C(=O)O)C.C(CO)N.C(CO)N

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	thrombopoietin receptor
In vitro	Eltrombopag demonstrates a half maximal effective concentration (EC50) of 0.27 μM in murine BAF3 cells transfected with the luciferase reporter gene under direction of the STAT-activated IRF-1 promoter and human TpoR (BAF3/IRF-1/hTpoR). Eltrombopag activates the receptor by association with metal ions (i.e., Zn2+) and specific amino acids within the transmembrane and juxtamembrane domains of the TpoR. Eltrombopag (30 μM) results in activation of STAT5 in N2C-Tpo cells, as detected with an antiphospho-STAT5 antibody on Western blots. Eltrombopag stimulates proliferation after a 2-day incubation with an EC50 of 0.03 μM in a BrdU assay conducted in BAF3/hTpoR cells. Eltrombopag also induces differentiation of hematopoietic stem cells into committed megakaryocyte progenitor cells. Eltrombopag increases the differentiation of bone marrow CD34+ cells into CD41+ megakaryocytes in a dose-dependent manner with an EC50 of 0.1 μM. Eltrombopag inhibits N2C-Tpo cell and HEL92.1.7 cell proliferating with IC50 of 20.7 μg/mL and 2.3 μg/mL. Eltrombopag (20 μg/mL) leads to a decreased cell division rate, a block in G(1) phase of cell cycle, and increased differentiation in human and murine leukemia cells. Eltrombopag (5 μg/mL) shows clear signs of differentiation, significant changes in the organization of the nuclear contents, and an increase in the cytoplasm/nucleus ratio in HL60 cells. Eltrombopag (5 μg/mL) causes an increase in CD11b, which is consistent with a premacrophage state in U937 cells, and also causes an increase in CD11b in URE cells. Eltrombopag leads to a reduction in free intracellular iron in leukemic cells in a dose-dependent manner in HL60 cells.
In vivo	Eltrombopag (10 mg/kg per day) increases platelet counts over twofold approximately 1 week after the last dose for one chimpanzee and approximately 1.5-fold for the other two chimpanzees. Eltrombopag (1 mg/mL) prolongs survival in mouse models of leukemia.
References	[1] https://pubmed.ncbi.nlm.nih.gov/19038790/ [2] https://pubmed.ncbi.nlm.nih.gov/20202683/ [3] https://pubmed.ncbi.nlm.nih.gov/22627766/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2025-09-24)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT07189910	NOT_YET_RECRUITING	Primary Immune Thrombocytopenia (ITP)	Union Hospital, Tongji Medical College, Huazhong University of Science and Technology	2025-12-01	PHASE4
NCT05961410	RECRUITING	Lymphoma; Peripheral Blood Stem Cell Transplantation	National Taiwan University Hospital	2023-08-15	PHASE2
NCT01927731	COMPLETED	Bone Marrow Transplantation Recipient; Cord Blood Transplant Recipient; Hematopoietic Cell Transplantation Recipient	M.D. Anderson Cancer Center	2013-10-14	PHASE2
NCT06768619	COMPLETED	Thrombocytopenia	Chia Tai Tianqing Pharmaceutical Group Co., Ltd.	2023-03-20
NCT01428635	COMPLETED	Accelerated Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive; Blast Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive; Chronic Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive; Primary Myelofibrosis; Thrombocytopenia	M.D. Anderson Cancer Center	2012-01-13	PHASE2; PHASE3
NCT01772420	COMPLETED	Adult Myelodysplastic Syndrome; Anemia; Chronic Myelomonocytic Leukemia	Albert Einstein College of Medicine	2012-10	PHASE2

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Eltrombopag Olamine TpoR agonist

Chemical Structure

Molecular Weight: 564.63