1. Autophagy
  2. Autophagy
    Estrogen Receptor/ERR
  3. Tamoxifen

Tamoxifen (Synonyms: ICI47699; Z-Tamoxifen; trans-Tamoxifen)

Cat. No.: HY-13757A Purity: 99.76%
Handling Instructions

Tamoxifen is a selective estrogen receptor modulator (SERM) which blocks estrogen action in breast cells and can activate estrogen activity in other cells, such as bone, liver, and uterine cells.

For research use only. We do not sell to patients.

Tamoxifen Chemical Structure

Tamoxifen Chemical Structure

CAS No. : 10540-29-1

Size Price Stock Quantity
Free Sample (0.5-1 mg)   Apply now  
10 mM * 1 mL in DMSO USD 66 In-stock
Estimated Time of Arrival: December 31
500 mg USD 60 In-stock
Estimated Time of Arrival: December 31
1 g USD 83 In-stock
Estimated Time of Arrival: December 31
5 g USD 288 In-stock
Estimated Time of Arrival: December 31
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Other Forms of Tamoxifen:

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  • Biological Activity

  • Protocol

  • Technical Information

  • Purity & Documentation

  • References


Tamoxifen is a selective estrogen receptor modulator (SERM) which blocks estrogen action in breast cells and can activate estrogen activity in other cells, such as bone, liver, and uterine cells.

IC50 & Target

Estrogen receptor[1]

In Vitro

Tamoxifen shows strong inhibition of MCF-7 cells (EC50=1.41 μM) and to a lesser extent the T47D cells (EC50=2.5 μM) but does not affect the MDA-MB-231 cells[2].

In Vivo

The Tamoxifen-inducible gene knockout strategy has clear advantages in that expression of a gene can be ablated in adult mice at will in a tissue specific manner. To study the role of Med1 in adult heart, 7-week old TmcsMed1-/- mice are given a daily Iintraperitoneal injection of Tamoxifen at a dose of 65 mg/kg for 5 days and killed at selected intervals thereafter. qPCR analysis of RNA shows that the Med1 expression begin to decrease after 3 days of Tamoxifen injection (about 70% decrease), and by 5 days of injection, Med1 expression is almost non-detectable in the heart. Tamoxifen-inducible cardiac-specific disruption of Med1 (TmcsMed1-/-) in adult mice causes dilated cardiomyopathy[3].

Clinical Trial
Solvent & Solubility
In Vitro: 

DMSO : ≥ 30 mg/mL (80.75 mM)

*"≥" means soluble, but saturation unknown.

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.6917 mL 13.4586 mL 26.9172 mL
5 mM 0.5383 mL 2.6917 mL 5.3834 mL
10 mM 0.2692 mL 1.3459 mL 2.6917 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Tamoxifen is prepared in corn oil[4].

Animal Administration

Seven-week old TmcsMed1-/- mice and the wild-type littermates are then administered Tamoxifen intraperitoneally at a daily dose of 65 mg/kg body weight for 5 days and then killed at selected intervals after initiation of Tamoxifen treatment. For each experiment 3 to 5 mice for control and csMed1-/- are used. To obtain survival curve 41 csMed1-/- and 41 csMed1fl/fl mice are used. Thirteen TmcsMed-/- mice and the same number of littermates are used for the survival curve experiments using Tamoxifen inducible model. The specific criteria for animal euthanasia included absence of food or water intake, slow or no mobility, weak or absence of heart beat, absence of palpitation of the chest as well as absence of respiratory movement. Mice are euthanized by intraperitoneal pentobarbital injection at the dose of 150mg/kg body weight to minimize suffering.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight








Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month

Room temperature in continental US; may vary elsewhere

Purity: 99.76%

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This equation is commonly abbreviated as: C1V1 = C2V2

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× = ×
C1   V1   C2   V2

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Cat. No.: HY-13757A