Endoxifen

Inventory Status:

Out of stock

Price range: $48.00 through $60.00

Price per mg
Tablets 50 Count (1,000mg)$0.060/mg
30ml Vial (Liquid) (600mg)$0.080/mg

Strict Regulatory Notice: This agent is synthesized strictly for laboratory-based research and analytical purposes. It is not intended for human or veterinary use, nor for medical, household, or cosmetic applications. Please review our Terms of Service thoroughly before finalizing your acquisition.

Endoxifen for laboratory research: 50 tablets at approximately 20mg each, or a 30mL reference solution at 20mg/mL. ≥98% HPLC batch specification, with Certificate of Analysis.
Concentration and Formulation
Tablet Concentration50 Tablets (~20 mg/Tablet, laboratory reference use only)
Inactive IngredientsMicrocrystalline cellulose, Magnesium stearate, Dicalcium phosphate, Silicon dioxide
Liquid Concentration And SolutionReference solution in PEG-400 / Ethanol (90:10 v/v)
Nominal analytical concentration (~20 mg/mL, 30mL, 600mg total, laboratory reference use only)
For Research Use Only. Not for human or veterinary use
Key Documents
SDSTabletSDSSolutionCOAComing soon
Third-party lab testing in progress. The COA for this batch will be posted here as soon as results are in.
SDS = Safety Data Sheet  ·  COA = Certificate of Analysis

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Key Specifications

ParameterSpecification / Details
Primary Compound NameEndoxifen, (Z)-isomer (Non-Steroidal SERM)
CAS Registry Number112093-28-4 ((Z)-isomer), 110025-28-0 (E/Z mixture)
IUPAC Designation4-[(Z)-1-[4-[2-(methylamino)ethoxy]phenyl]-2-phenylbut-1-enyl]phenol
SynonymsZ-Endoxifen, 4-Hydroxy-N-desmethyltamoxifen, N-Desmethyl-4-hydroxytamoxifen
Molecular FormulaC25H27NO2
Molar Mass / Weight373.49 g/mol
Compound ClassTriphenylethylene derivative / active tamoxifen metabolite
Physical AppearanceWhite tablet / Clear, colorless to pale yellow solution (raw material: white to off-white powder)
Solubility ProfileSoluble in DMSO, Ethanol and PEG-400. Practically insoluble in water.
Tested Purity≥98% via HPLC
Tablet Concentration~20mg per tablet, 50 tablets (1,000mg total)
Inactive Ingredients (Tablets)Microcrystalline cellulose, Magnesium stearate, Dicalcium phosphate, Silicon dioxide
Liquid / Solution Concentration20mg/mL in a PEG-400 / Ethanol (90:10 v/v) carrier, 30mL (600mg total)
Related CompoundsTamoxifen (parent compound), 4-Hydroxytamoxifen, Enclomiphene Citrate
Storage GuidelinesTablets: cool, dry, protected from light; 2–8°C for long-term storage. Liquid: controlled room temperature (20–25°C), tightly capped, protected from light and ignition sources; do not refrigerate.
Estimated Shelf Life24 months from manufacture date when stored as directed.
Safety DocumentationSDS available for Endoxifen 20 mg Tablets and Endoxifen 20 mg/mL Solution
Terms of ApplicationFor laboratory research purposes only. Not for human or veterinary use. Investigated as a high-affinity, CYP2D6-independent estrogen receptor (ERα/ERβ) ligand in cellular and biochemical models.

Foundational Scientific Overview

Foundational Scientific Overview

Endoxifen (4-hydroxy-N-desmethyltamoxifen) is a prominent subject within the field of selective estrogen receptor modulators (SERMs). As the principal active metabolite of tamoxifen, it has become a key reference compound for researchers examining estrogen receptor signaling, endocrinology, and hormone-responsive cell models. Unlike tamoxifen, endoxifen does not require CYP2D6 bioactivation, removing a major source of metabolic variability from experimental designs.

At 4-Amino-Labs, we provide this compound in 20mg tablets (50 count) and a 20mg/mL liquid solution (30mL, PEG-400/ethanol 90:10) to ensure experimental reproducibility. By maintaining rigorous measurement standards, we provide the consistency required for longitudinal data integrity. Endoxifen is widely cited in peer-reviewed literature for its high-affinity, well-documented interaction with estrogen receptor alpha (ERα) and estrogen receptor beta (ERβ).

Analytical Composition and Purity

Purity≥98%via HPLC
FormulaC25H27NO2
Molecular Weight373.49 g/mol
Isomer(Z)-endoxifen
Appearance (raw material)White to off-white crystalline powder
SolubilitySoluble in organic solvents such as DMSO and ethanol; practically insoluble in water
StabilityLight sensitive; stable under cool, dry, dark laboratory storage.

Investigational Pathways

Competitive ERα and ERβ binding and estradiol displacement
Estrogen-mediated gene transcription and its inhibition
ERα protein degradation in hormone-responsive cell lines (e.g. MCF-7)
CYP2D6-independent SERM activity versus parent tamoxifen
Comparative SERM pharmacodynamics and tissue-selective agonist/antagonist profiling

Laboratory Handling and Stability

Thermal Regulation
Tablets: store in a cool, desiccated environment; refrigeration at 2–8°C is recommended for long-term storage. Liquid: store at controlled room temperature (20–25°C) and do not refrigerate or freeze, as cold can cause the PEG-400 solution to cloud. If clouding occurs, return to room temperature and mix until clear.
Photostability
Endoxifen is light sensitive and can undergo Z/E isomerization. Keep in the original opaque or amber container, away from direct light.
Seal Integrity
Ensure the cap is tightly closed after every withdrawal to prevent moisture absorption and ethanol evaporation, which would raise the solution concentration.
Flammability
The liquid contains ethanol; keep away from heat, sparks, and open flame.
Containment
Wear nitrile gloves, and crush, split, or weigh tablets only in a fume hood or ventilated enclosure. Review the Safety Data Sheet before handling.

Compliance and Safety

Endoxifen is supplied strictly as a Research Use Only (RUO) laboratory reference compound for in-vitro and pre-clinical investigation. It is not a drug, dietary supplement, or approved medicine, and is not for human or veterinary use. Endoxifen is classified as a suspected carcinogen and reproductive toxicant (see Safety Data Sheet): persons who are pregnant, breast-feeding, or may become pregnant should not handle this product. Handle only by qualified personnel with appropriate protective equipment, and dispose of waste through a licensed contractor.

Analytical Composition & Purity Standards

  • Chemical Formula: C25H27NO2
  • Molecular Weight: 373.49 g/mol
  • Isomer: (Z)-endoxifen
  • Appearance (raw material): White to off-white crystalline powder
  • Solubility: Soluble in organic solvents such as DMSO and ethanol; practically insoluble in water
  • Stability: Light sensitive; stable under cool, dry, dark laboratory storage.

Our Endoxifen undergoes a multifaceted verification process. Each batch is subjected to independent High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) to ensure a purity threshold of ≥ 98%, including confirmation of the (Z)-isomer. This analytical rigor ensures the absence of residual solvents, heavy metals, or cross-contaminants, providing a stable baseline for your in-vitro or pre-clinical models. Researchers looking to buy endoxifen tablets often prioritize verified purity and consistent quality standards.

Investigational Pathways

Researchers utilizing Endoxifen typically focus on the following biochemical mechanisms:

Endoxifen is commonly examined in molecular endocrinology and estrogen receptor research, particularly in studies involving:

  • Competitive ERα and ERβ binding and estradiol displacement
  • Estrogen-mediated gene transcription and its inhibition
  • ERα protein degradation in hormone-responsive cell lines (e.g. MCF-7)
  • CYP2D6-independent SERM activity versus parent tamoxifen
  • Comparative SERM pharmacodynamics and tissue-selective agonist/antagonist profiling

Because it is supplied in its active, post-metabolic form, endoxifen allows researchers to isolate SERM activity from the confounding effects of variable tamoxifen metabolism.

Laboratory Handling & Stability Protocol

To maintain the molecular integrity of Endoxifen, the following storage parameters are
recommended:

  1. Thermal Regulation: Tablets: store in a cool, desiccated environment; refrigeration at 2–8°C is recommended for long-term storage. Liquid: store at controlled room temperature (20–25°C) and do not refrigerate or freeze, as cold can cause the PEG-400 solution to cloud. If clouding occurs, return to room temperature and mix until clear.
  2. Photostability: Endoxifen is light sensitive and can undergo Z/E isomerization. Keep in the original opaque or amber container, away from direct light.
  3. Seal Integrity: Ensure the cap is tightly closed after every withdrawal to prevent moisture absorption and ethanol evaporation, which would raise the solution concentration.
  4. Flammability: The liquid contains ethanol; keep away from heat, sparks, and open flame.
  5. Containment: Wear nitrile gloves, and crush, split, or weigh tablets only in a fume hood or ventilated enclosure. Review the Safety Data Sheet before handling.

Compliance & Safety Disclaimer

This substance is provided exclusively for in-vitro laboratory research and pre-clinical developmental testing. 4-Amino-Labs does not condone or authorize the use of this product in any clinical setting or for personal consumption. Misuse of laboratory chemicals carries significant health risks. By purchasing, the researcher acknowledges the inherent risks and confirms they possess the necessary equipment and expertise to handle these materials safely.

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Endoxifen