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Estrone 3-Methyl Ether

    • Product Name Estrone 3-Methyl Ether
    • Alias Estrone methyl ether
    • Einecs 207-097-0
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry sales7@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
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    Specifications

    HS Code

    152940

    Chemical Name Estrone 3-Methyl Ether
    Cas Number 1607-26-1
    Molecular Formula C19H22O2
    Molecular Weight 282.38
    Synonyms 3-Methoxyestrone, Estrone methyl ether
    Appearance White to off-white solid
    Melting Point 223-225°C
    Solubility Insoluble in water, soluble in organic solvents
    Storage Temperature 2-8°C
    Chemical Structure Steroid nucleus with methoxy group at position 3
    Pubchem Cid 66947
    Inchi Key ZQXSXAIFKWMKPA-QXUSSOQMSA-N
    Smiles COC1=CC2=C(C=C1)C3CCC4C(C3=O)CCC4=C2

    As an accredited Estrone 3-Methyl Ether factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing White, sealed glass bottle containing 5 grams Estrone 3-Methyl Ether; labeled with chemical name, purity, hazard symbols, and batch details.
    Shipping Estrone 3-Methyl Ether is shipped in tightly sealed containers, protected from light, moisture, and incompatible materials. It is handled according to standard chemical safety protocols, often under ambient or slightly cooled conditions. Transport complies with relevant regulations to ensure safe delivery, minimizing exposure and contamination risks during transit.
    Storage Estrone 3-Methyl Ether should be stored in a tightly sealed container, away from light and moisture, at a cool temperature (preferably 2–8°C, refrigerated or as specified by the supplier). The storage area should be well-ventilated and free from incompatible substances such as strong oxidizers. Proper labeling and secure placement help prevent accidental misuse or degradation of the compound.
    Application of Estrone 3-Methyl Ether

    Applications of Estrone 3-Methyl Ether in Industrial Manufacturing

    As a specialized manufacturer of Estrone 3-Methyl Ether, we focus on its established industrial applications across advanced pharmaceutical synthesis, reference standards, and diagnostic reagent production. Each scenario below outlines concrete integration within these domains, covering compliance, process, formulation, and final output, ensuring users meet regulatory and operational targets down the supply chain.

    1. Pharmaceutical Intermediate for Selective Estrogen Receptor Modulator (SERM) Synthesis

    Estrone 3-Methyl Ether serves as a critical intermediate in the multi-step chemical synthesis of specific SERMs, particularly compounds used in hormone-related cancer therapies. Its methyl ester moiety is strategically leveraged in reaction steps involving aromatic modification and protection, supporting controlled ring-opening and site-specific methylation, essential for high-yield active pharmaceutical ingredient (API) manufacturing within regulated GMP environments.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • European Pharmacopoeia (Ph. Eur.) monograph 01/2008:0404, as relevant for intermediates
    • US FDA 21 CFR Part 211 – Current Good Manufacturing Practice for Finished Pharmaceuticals
    • China Pharmaceutical GMP (2020 Edition)

    Typical usage ratio

    • Intermediate integration: 0.3–1.5 molar equivalents per synthesis batch, adjusted to stoichiometric requirements for the specific SERM scaffold
    • Batch-scale adjustment: Excess up to 10% for process yield optimization and impurity control

    Downstream process integration

    • Input prior to aryl ether cleavage and functional group derivatization steps
    • Introduced post-raw material purification for reaction sequence initiation
    • Removed post-condensation via preparative chromatography during API purification

    Final product types

    • Active pharmaceutical ingredients for SERM-based breast cancer therapies (e.g., Tamoxifen analogues)
    • GMP bulk API for global oncology drug manufacturers
    • Advanced intermediate stock solutions for contract development organizations (CDMO) and custom synthesis labs

    2. Reference Standard for Analytical Laboratories

    Pharmaceutical quality control and regulatory release testing laboratories employ Estrone 3-Methyl Ether as a certified reference material (CRM) in the quantitative analysis of steroidal drug products. Its stable methylation profile allows analysts to calibrate HPLC and GC-MS instruments, verify extraction efficiency, and ensure accurate trace-level quantification in batch release testing or method development projects.

    Industry compliance standards

    • ISO 17034 General requirements for the competence of reference material producers
    • ISO/IEC 17025 Testing and calibration laboratories competence
    • FDA Analytical Procedures and Methods Validation Guidance for Drugs and Biologics
    • USP General Chapter <1220> Analytical Procedure Life Cycle

    Typical usage ratio

    • Calibration solution preparation: 2–10 μg/mL in acetonitrile or methanol for HPLC/GC-MS reference points
    • Matrix spike/recovery studies: 0.05–0.2% relative to analyte content, depending on expected steroid concentration

    Downstream process integration

    • Dissolved and aliquoted during standard solution preparation for daily or batch-specific instrument calibration
    • Incorporated into analytical validation runs and proficiency testing sample sets
    • Co-processed in method development optimization for steroid quantitation

    Final product types

    • Certified reference standards (CRM) for regulatory submission packages
    • Ready-to-use calibration kits for clinical and forensics laboratories
    • Secondary working standards for pharmaceutical batch release laboratories

    3. Intermediate in Diagnostic Reagents for Hormone Assays

    Research reagent and diagnostic kit manufacturers utilize Estrone 3-Methyl Ether to synthesize enzyme-labeled conjugates, tracers, and antibodies for immunoassay platforms that detect estrogens in clinical samples. By leveraging its unique structural features, manufacturers selectively derivatize the molecule to achieve defined cross-reactivity profiles and amplified assay sensitivity in ELISA, RIA, and CLIA testing environments.

    Industry compliance standards

    • ISO 13485 Quality Management Systems for Medical Devices
    • EU Regulation (EU) 2017/746 In Vitro Diagnostic Medical Devices Regulation (IVDR)
    • FDA 21 CFR 820 Quality System Regulation (QSR) for Medical Devices
    • CLSI EP05-A3 Evaluation of Precision Performance of Quantitative Measurement Methods

    Typical usage ratio

    • Conjugation reactions: 0.1–0.3 mmol per 1 mmol activated NHS-ester or maleimide label, tailored to desired tracer concentration
    • Final dilutions: Adjusted to 0.2–10 ng per single assay well per platform sensitivity

    Downstream process integration

    • Added after hormone extraction and prior to hapten-carrier coupling in immunogen synthesis
    • Processed through site-directed enzyme conjugation and labeled analyte purification
    • Integrated into bulk reagent formulation and kit assembly for diagnostic kit production

    Final product types

    • ELISA and RIA kits for estrogen monitoring in clinical diagnostics
    • Labeled hormone conjugates for research-use-only (RUO) in academia and biotechnology labs
    • Reference reagents for commercial CLIA-based hormone analyzers

    4. Precursor in Custom Steroid Modification Services

    Custom fine chemical and steroid modification operations rely on Estrone 3-Methyl Ether as a substrate for post-synthetic methylation, deprotection, or derivatization projects. These processes enable contract researchers and specialty pharmaceutical innovators to create novel esterified steroids with optimized pharmacological or analytical properties, often requiring extensive structure-activity relationship (SAR) studies and targeted scale-up procedures.

    Industry compliance standards

    • OECD Principles of Good Laboratory Practice (GLP) for non-clinical studies
    • ISO 9001 Quality Management Systems for custom synthesis workflows
    • REACH Regulation (EC) No 1907/2006 for chemical safety in Europe
    • Globally Harmonized System (GHS) chemical labeling and transport compliance

    Typical usage ratio

    • Custom methylation/derivatization: 0.5–2.0 molar equivalents per modified substrate, depending on client formulation and pilot-scale process design
    • Scale-adjusted: Evaluated per project to optimize conversion yield and minimize by-product formation

    Downstream process integration

    • Fed into multi-step organic synthesis after initial substrate purification
    • Modified via catalytic, enzymatic, or chemical transformation as required by project specifications
    • Final product isolated by advanced purification methods (e.g., preparative HPLC, crystallization) prior to delivery

    Final product types

    • Niche methylated steroids for preclinical research in pharmaceutical pipelines
    • Custom reference compounds for analytical kit developers
    • Specialty reagents for life sciences contract research projects
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    Certification & Compliance
    More Introduction

    Estrone 3-Methyl Ether: A Closer Look from the Manufacturer’s Bench

    For those of us in chemical manufacturing, Estrone 3-Methyl Ether stands out for more than its place on a product list. Years of refining production methods and consulting with our scientific partners have shaped how we view this compound in both process and application. Producing this chemical in our facilities always brings up a conversation about its roots in research, synthetic development, and the importance of consistency batch to batch.

    Model and Specifications—Built on Reliability

    Not all Estrone 3-Methyl Ether products come from the same process. We follow a well-established synthesis pathway, but details like reagent quality, temperature control, and chromatography protocols make the difference between a mediocre and a highly pure lot. Our standard model meets a purity minimum of 98%, with HPLC and NMR confirmation for each batch release. Years ago, we witnessed cases where even slight lapses in temperature maintenance during methylation would cause unwanted side products—minor tweaks in process scale-up led to better control and fewer headaches downstream.

    Every technical person here understands that documentation only tells part of the story. Our product typically ships as a white or off-white crystalline powder, an appearance that signals both correct synthesis and solid crystallization handling. Water content sits below 0.5%, as confirmed by Karl Fischer titration. Residual solvents get checked by GC to stay within stringent industry limits. These practices aren’t implemented for show—they are the result of feedback from our clients in pharmaceuticals and analytical laboratories. A research customer once called about melting point inconsistencies, prompting us to revise drying conditions and resulting in a far more stable product in subsequent offerings.

    Applications—Shaped by Laboratory Needs

    Chemists in hormone research, drug development, and analytical method design often turn to Estrone 3-Methyl Ether as a reference or building block. We have supplied this compound for metabolism and excretion studies, as methyl ethers provide clues into the fate of parent estrogens in biological systems. This specific methylated version resists certain enzymatic transformations, giving researchers a clearer picture of pathways affected by methyl substitutions.

    We also get requests for Estrone 3-Methyl Ether in analytical quality control labs, particularly where stable, precisely characterized standards are needed for instrument calibration or proficiency testing. Rigorous quality control suits us because we rely on in-house produced reference material as well. Every batch is tested against our own internal standards to minimize shifts in assay results between lots. We learned early—the tighter our controls, the less troubleshooting needed for those relying on our compounds in their high-stakes studies.

    Comparisons—What Sets Estrone 3-Methyl Ether Apart

    We get asked about the differences between Estrone 3-Methyl Ether and its cousins—methylated estrone derivatives or other estrogen analogues. Simply put, methylation at the 3-position blocks certain metabolic oxidations. Unlike Estrone itself, the ether loses hydrogen bonding at the phenolic group, resulting in distinct pharmacokinetics and interaction profiles. Some clients once hoped it would function as a direct substitute in older biological protocols; post-trial feedback told us to revisit our technical data sheets. The chemical’s reduced reactivity at that site highlights why results diverge from parent estrone in both in vitro and animal models.

    Producing both Estrone and Estrone 3-Methyl Ether under one roof illustrated practical contrasts in synthesis workflow. The parent molecule, Estrone, requires careful attention during isolation to prevent oxidative darkening—a challenge less pronounced with the methyl ether. Still, the methyl ether’s own process brings purification challenges, especially since certain methylating agents can introduce hard-to-remove byproducts unless optimized. Only after several campaign runs and feedback from our quality control chemists did we refine protocols sufficiently to recommend our product for sensitive detection work, where even trace impurities would skew results.

    Quality in Practice—Experience-Guided Improvements

    Working directly on the production floor brings lessons that technical papers don’t always mention. Early attempts at upscaling Estrone 3-Methyl Ether required constant adjustments—seemingly small factors like stirrer blade material or crystal seeding technique influenced overall purity. Feedback loops involving production, QC, and R&D shaved inefficiency, reduced rework, and led to a process robust enough for us to guarantee batch-after-batch reproducibility. One chemist on our team once pointed out odd streaking in the end-stage drying trays—an observation that led to a shift in tray design and much tighter moisture controls. These little discoveries mark the day-to-day of handling specialty chemicals at scale.

    We know the importance of transparency with our partners in pharmaceuticals, diagnostics, or academia. Open communications about batch-specific data, including any aberrations found during synthesis, help researchers avoid costly surprises in their programs. That approach guided us through a recent incident involving unidentified trace impurity spikes. Investigation led us back to a contaminated batch of methylating reagent; tracing the source and adjusting procurement safeguards not only solved the issue but prevented future recurrences.

    Trust Earned through Consistency

    Manufacturers carry the responsibility for making sure each shipment matches the specifications promised. The stakes run particularly high for chemicals like Estrone 3-Methyl Ether, which must serve as a reference or intermediate in high-precision environments. Instead of treating QA as an afterthought, our focus rests squarely on verification at every stage. Each batch receives full traceability—raw material lots get cross-referenced, every analytical report links back to the staff member overseeing the run, and we collect performance feedback after delivery.

    Direct conversations with clients shape improvements. One long-term partner in endocrinology research pointed out how minor shifts in crystal habit affected dissolution rates during sample prep. Our team responded by tweaking solvent addition rates and cooling cycles, resulting in a more uniform particle distribution and far fewer handling complaints. Instead of distant, impersonal transactions, the feedback cycle built respect and iteration into our production.

    Safety and Handling—Grounded in Practical Experience

    Dealing with steroidal compounds such as Estrone 3-Methyl Ether requires a solid respect for their biological activity. Experience teaches vigilance. Production teams wear appropriate PPE, and air handling systems receive continual maintenance to minimize operator exposure. Early on, unfamiliar staff handled smaller scale runs; now every new operator undergoes safety briefings covering both the health effects and environmental precautions needed for this class of chemicals. Ethereal solvent use during synthesis has driven us to install additional vapor recovery and fire safety measures. These steps don’t add visible value to the end-user, but they shape the reliability and continuity of our supply chain.

    Transport and storage receive just as much attention. Finished Estrone 3-Methyl Ether lots ship in airtight containers with desiccant packs and tamper-evident seals. Each shipment includes a certificate outlining relevant test results, but also practical guidance for storage and safe handling. After a shipping partner once left a pallet out in humid conditions, and we received several unsatisfactory reports on product clumping, we revised our packaging to further protect integrity during long-haul transport, especially across varied climates.

    Regulatory Aspects and Scientific Support

    Chemicals with hormonal features fall under stricter regulatory control in many countries. Our operations follow both internal policies and regional guidelines to ensure compliant production, labeling, and documentation for Estrone 3-Methyl Ether. Often, researchers request extra information on traceability due to evolving standards, particularly in GMP or ISO-accredited labs. This drives us to keep both process and documentation current—regulatory nonconformance is not an option.

    Supporting customers means more than shipping a bottle and a COA. We pool data from stability studies, shelf-life monitoring, and even customer pilot studies whenever available. The lab maintains a help desk, managed by our senior chemists, for technical questions about assay methods, solubility, or reporting. Recently a university partner needed comparative spectra for method development, and we provided both typical data and insights from our process notes to help solve their problem. This kind of scientific partnership comes naturally when the product’s reputation directly affects our own track record.

    Continuous Improvement—Learning Together

    Making Estrone 3-Methyl Ether at scale once seemed like a straightforward scaling exercise from the literature. Years of producing, packaging, and supporting it for researchers revealed the finer points—handling sensitive methyl transfers, optimizing cleanups, and preventing micro-contamination at each stage. Direct customer insights and post-market studies pushed us to shift purification protocols, rework analytical method validation, and address batch-to-batch appearance changes with real solutions, not just explanations.

    We treat every customer inquiry as an opportunity to revisit ongoing production and QC practices. Sometimes, even simple sample prep questions lead us to new stability data or better storage practices, which then benefit everyone who orders from our site. By listening to feedback from those who handle or analyze Estrone 3-Methyl Ether daily, we capture mistakes before they snowball, and we spot tweaks that bring tangible improvements to the finished product.

    Looking Ahead—Anticipating Research Needs

    The demand for specialized reference chemicals such as Estrone 3-Methyl Ether tracks the pace of medical and analytical discovery. Our team keeps pace with emerging techniques in estrogen pathway mapping, analytical detection, and pharmacokinetic research—fields demanding rigorous purity and traceability. We also engage with external auditors and regulatory consultants to stay ready for future changes in standards or documentation expectations.

    Decades of work with estrogen derivatives tells us to expect evolving challenges—from trimming impurity profiles to optimizing mass-spectrometry-grade lots for laboratories pushing assay sensitivity. The compound’s role as both a research tool and a synthetic intermediate motivates us to keep refining every link of the supply chain. On-site pilot campaigns test new synthesis tweaks before full-scale implementation; feedback from these trials inspires leaner, greener chemistry and sharper QC throughout the operation.

    Differentiating Ourselves—the Manufacturer’s Perspective

    There is no shortcut to earning trust as a producer of fine chemicals. Our operation brings everything—from procurement through finished packaging—under our direct control. We see the value in repeatedly exceeding the formal requirements because smaller labs or early-stage R&D shops depend on our product functioning just as well the tenth time as it did the first.

    The chemical supply field has its share of intermediaries and repackagers. Our direct experience with Estrone 3-Methyl Ether allows us to share lessons hard-won at the bench, not simply ordered from a catalog. Customers benefit from in-depth knowledge in troubleshooting, method development, and preparations for clinical research support. Only a manufacturer has full command over both process details and historical performance, and that shows in every customer consultation we provide.

    Connecting with the Community

    Lasting relationships with universities, pharmaceutical companies, and smaller analytical labs shape every stage of our work on Estrone 3-Methyl Ether. Researchers often face tight budgets and even tighter tolerances—offering responsive support and technical transparency can mean the difference between a successful outcome and a rerun experiment. It’s not uncommon for us to receive feedback months after delivery, as labs complete method development or regulatory filings. Information gained from those experiences feeds back into our processes, helping both our facility and our customers avoid old pitfalls.

    Every time a customer’s analytical team calls with data from our product, it sparks practical conversations—batch trace data, subtle shifts in appearance, or methods for sample reconstitution used in remote field studies. These interactions sharpen our own knowledge and help us set practical priorities amid competing demands on production resources.

    Conclusion: Crafting Quality, One Batch at a Time

    Producing Estrone 3-Methyl Ether brings together specialized chemistry, hands-on problem-solving, customer service, and day-to-day adjustments. Our team approaches each new lot with the same rigor seen in the best research labs—tracking every variable, reviewing every step, and adjusting based on client input and internal discoveries. Direct manufacturing means seeing problems and opportunities up close, turning small course corrections into lasting improvements that echo through every department.

    Trust built through repeated quality and transparent support fosters ongoing collaboration with commercial partners and academic researchers alike. Every batch packed and shipped out stands as a testament to a process shaped by experience, learning, and an unwavering commitment to high standards in the world of specialty estrogens.