Explore our top-tier synthesized APIs, regulatory-backed raw materials, and custom peptide solutions.
An authoritative analysis of Estradiol Cypionate (CAS 313-06-4) synthesis, esterification kinetics, and pharmaceutical superiority.
Estradiol Cypionate is the 17β-cyclopentylpropionate ester of 17β-estradiol. The addition of the cyclopentylpropionate ester chain markedly increases the molecule’s lipophilicity compared to micronized estradiol or estradiol valerate, facilitating a depot mechanism upon intramuscular injection.
Due to slow absorption from hydrophobic muscular tissue depots, Estradiol Cypionate exhibits a prolonged duration of action (terminal half-life ranging from 8 to 10 days). This pharmacodynamic profile minimizes plasma peak-to-trough fluctuations, enhancing therapeutic tolerance.
Modern Chinese manufacturing facilities leverage plant-derived sterol precursors (such as phytosterols and diosgenin) converted through microbial biotransformation into 4-AD and ADD, ensuring sustainable, highly scalable, and animal-free API synthesis.
Chinese cGMP exporters adhere strictly to USP/EP pharmacopeial monographs. Below is the standardized Certificate of Analysis (CoA) benchmark maintained by Gentolex and top-tier domestic manufacturers:
| Test Parameter | Pharmacopeial Specification (USP/EP) | Gentolex Factory Standard Batch Results | Analytical Method |
|---|---|---|---|
| Appearance | White or practical white crystalline powder | Conforms (White crystalline powder) | Visual Inspection |
| Identification (IR / HPLC) | Conforms to reference spectrum | Conforms to USP Reference Standard | FTIR / HPLC Retention Time |
| Assay (Drying Basis) | 97.0% – 103.0% | 99.4% – 99.8% | RP-HPLC (UV Detection) |
| Melting Point | 149°C to 153°C | 150.5°C – 152.0°C | Capillary Melting Method |
| Specific Optical Rotation | +41.0° to +45.0° | +43.2° | Polarimetry (c=1 in dioxane) |
| Related Substances (Single Impurity) | ≤ 0.5% | < 0.10% | High-Performance Liquid Chromatography |
| Total Impurities | ≤ 1.0% | < 0.35% | RP-HPLC Quantification |
| Bacterial Endotoxins | ≤ 3.5 EU/mg (Injectable Grade) | < 0.25 EU/mg | LAL Gel-Clot Test |
| Residual Solvents | Complies with ICH Q3C Guidelines | Undetected / Well below ICH limits | Headspace Gas Chromatography (GC-MS) |
Macroeconomic analysis of steroid API supply chain shifts, regulatory evolution, and regional demand drivers.
Global demand for Estradiol Cypionate in human healthcare is driven by modern Hormone Replacement Therapy (HRT) regimens, management of severe menopausal vasomotor symptoms, and specialized gender-affirming care formulations requiring predictable long-acting estrogenic responses.
In large-animal livestock production (particularly across Latin America, North America, and Eastern Europe), Estradiol Cypionate (ECP) is a crucial pharmaceutical component in Fixed-Time Artificial Insemination (FTAI) protocols for cattle, significantly improving pregnancy rates and herd productivity.
Global regulatory bodies (US FDA, EMA, NMPA) are enforcing stringent controls on impurity thresholds (nitrosamines, heavy metals, residual catalysts). Pharmaceutical buyers now prioritize API suppliers who offer complete Drug Master Files (DMF) and comprehensive CEP certifications.
How Chinese chemical manufacturing infrastructure delivers uncompromised quality, cost efficiency, and global scalability.
Leading Chinese exporters like Gentolex operate unified industrial manufacturing bases spanning over 250,000 square meters. These facilities integrate automated intermediate synthesis, sterile crystallization, and micro-milling under a unified cGMP environment.
By implementing real-time continuous monitoring (PAT) during esterification and purification phases, Chinese automated plants eliminate batch-to-batch variation, ensuring precise particle size distribution (PSD) tailored to injectable suspension requirements.
China commands over 70% of the world’s steroidal intermediate key starting materials (KSMs). Vertical integration from crude plant extract biotransformation to final sterile active pharmaceutical ingredient guarantees multi-ton supply security.
Evaluating supplier capability, custom micronization requirements, and seamless import workflows.
When sourcing Estradiol Cypionate API for finished dosage form (FDF) manufacturing, procurement departments must evaluate three primary parameters: Micronization Control (D90 < 10μm for uniform oil suspension stability), Sterile Grade vs Non-Sterile API classification, and Endotoxin Limits for parenteral administration.
Mainly utilized in depot oil-based injections (e.g., in cottonseed oil or sesame oil with benzyl benzoate). High stability, precise particle control, and zero microbial contaminants are critical for long-acting therapeutic efficacy.
Formulated into combined reproductive synchronized injections for cattle and equine management. Demands large commercial supply volumes, competitive price structures, and flexible packaging (1kg, 5kg, 25kg fiber drums with double PE liners).
Leading Chinese suppliers offer specialized particle engineering (jet milling), custom batch sizes, and regulatory document support (CTD format dossiers, stability data under ICH long-term and accelerated conditions).
Connecting global healthcare partners with reliable products and world-class technical consultation.
Gentolex’s goal is to create opportunities connecting the world with better services and guaranteed products. Up to date, Gentolex Group has been serving customers from more than 10 countries, specially, representatives are established in Mexico and South Africa. Our main services focus on supplying peptides APIs and Custom Peptides, FDF license out, Technical Support & Consultation, Product Line and Lab Setup, Sourcing & Supply Chain Solutions.
An overall factory construction area of 250,000 square meters under international standard to offer flexible, scalable and cost-effective solutions.
Gentolex offers an extensive range of APIs and intermediates for development study and commercial application with cGMP standard from long-term collaborations. Documents and Certificates are supported to customers worldwide.
For those clients who prefer to avoid the complexity of dealing with multiple points of contact, we provide extra customized procurement services with the most superior and comprehensive supply chain sources.
End-to-end technical support, FDF licensing out, and full product line installation and laboratory setup consultation worldwide.
Stay informed with the latest scientific research, technical breakthroughs, and chemical API news.
Selank Acetate API is a synthetic heptapeptide active pharmaceutical ingredient composed of the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. Developed for neuropharmacological applications...
Read Full Insight
As a professional Thymosin Beta-4 API supplier, we provide high-grade peptide solutions for biotech enterprises, clinical research organizations, and institutional laboratories...
Read Full Insight
BPC-157 API is a synthetic pentadecapeptide with increasing global research demand regarding tissue repair mechanisms, gastrointestinal protection, and cellular signaling...
Read Full Insight
With advances in neuroscience and peptide synthesis technology, neuroactive peptides have become a pivotal domain. Semax, derived from an ACTH fragment, offers unique structural properties...
Read Full Insight
SS-31 API (Elamipretide, MTP-131) is a synthetic mitochondria-targeting tetrapeptide designed to bind cardiolipin in the inner membrane, supporting cellular bioenergetics...
Read Full InsightTechnical, regulatory, and commercial insights for sourcing Estradiol Cypionate from China.
Browse our global supply portfolio of high-purity peptides, APIs, and specialty industrial compounds.
