Description

Estradiol Undecylate is a long-acting ester derivative of the natural estrogen, estradiol. This compound is valued for its sustained-release profile, providing prolonged hormonal activity which is critical for therapeutic applications. It is primarily required by the pharmaceutical industry for the development of long-term hormone replacement therapies and other advanced endocrine formulations.

Application

• Pharmaceutical Active Ingredient (API): Core component in long-acting injectable estrogen therapies.
• Hormone Replacement Therapy (HRT): Used in formulations for managing menopausal symptoms and estrogen deficiency.
• Veterinary Pharmaceuticals: Employed in reproductive health management for animals.
• Research & Development: Serves as a key reference standard and intermediate in endocrine and metabolic research.
• Controlled-Release Drug Delivery Systems: Utilized in the design of implants and depot injections due to its esterified, lipophilic nature.

Basic Information

Product Name	Estradiol Undecylate
CAS No.	3571-53-7
Molecular Formula	C29H44O3
Molecular Weight	440.66 g/mol
Synonyms	Estradiol 17-Undecylate; Estradiol 17β-Undecylate; NSC 17591; 17β-Estradiol 17-undecylate; Estr-1,3,5(10)-triene-3,17β-diol 17-undecylate; Oestradiol Undecylate; Estradiol Heptadecanoate (obsolete); Estra-1,3,5(10)-triene-3,17-diol (17β)-, 17-undecanoate
EINECS	Contact for details

Quality Control

Our Estradiol Undecylate is manufactured under strict quality systems. Each batch is tested to ensure it meets high-purity standards suitable for pharmaceutical applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Related Substances (HPLC)	Total impurities ≤2.0%
Loss on Drying	≤1.0%
Residue on Ignition	≤0.1%

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