Description

Oestradiol Undecanoate CAS NO 33613-02-4 is a long-chain fatty acid ester of the natural estrogen, estradiol. This chemical modification enhances its lipophilicity and stability, making it a critical intermediate for advanced pharmaceutical development. It is primarily utilized by research institutions and manufacturers in the pharmaceutical and biotechnology sectors for the synthesis of long-acting hormonal therapies and novel drug delivery systems.

Application

• Pharmaceutical Intermediate: Key starting material for the synthesis of long-acting injectable estrogen formulations.
• Hormone Replacement Therapy (HRT) Research: Used in the development of sustained-release drug products for menopausal symptom management.
• Steroid Prodrug Development: Serves as a model compound for creating lipophilic prodrugs to improve bioavailability and duration of action.
• Biochemical Research: Employed in laboratory studies to investigate estrogen receptor interactions and metabolic pathways.
• Veterinary Pharmaceuticals: Potential use in the formulation of hormonal treatments for animals.

Basic Information

Product Name	Oestradiol Undecanoate
CAS No.	33613-02-4
Molecular Formula	C29H46O3
Molecular Weight	442.68 g/mol
Synonyms	Estradiol Undecanoate; 17β-Estradiol 17-undecanoate; Estradiol 17-hendecanoate; NSC 17591; Oestradiol 17-undecanoate; Estr-1,3,5(10)-triene-3,17β-diol 17-undecanoate
EINECS	Contact for details

Quality Control

Our Oestradiol Undecanoate is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets high-purity standards suitable for research and pharmaceutical applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed in a low-humidity environment to maintain stability and prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Single Unknown Impurity	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.