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19-Norandrostenediol

    • Product Name 19-Norandrostenediol
    • Alias 4-estrene-3β,17β-diol
    • Einecs 211-373-9
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    747074

    Chemical Name 19-Norandrostenediol
    Molecular Formula C18H28O2
    Molar Mass 276.42 g/mol
    Appearance White crystalline powder
    Category Anabolic-androgenic steroid
    Cas Number 521-11-9
    Melting Point 125-128°C
    Synonyms Estr-4-ene-3,17-diol
    Route Of Administration Oral
    Use Performance enhancement

    As an accredited 19-Norandrostenediol factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing White, sealed plastic bottle labeled "19-Norandrostenediol", 100 grams. Includes hazard symbols, batch number, lot details, and usage instructions.
    Shipping Shipping of 19-Norandrostenediol is conducted in compliance with all relevant regulations. The chemical is securely packaged in sealed containers to prevent leakage or contamination, labeled appropriately, and shipped via certified carriers. Handling and transportation follow safety guidelines to ensure product integrity and minimize exposure risk during transit.
    Storage 19-Norandrostenediol should be stored in a tightly sealed container, away from moisture, heat, and direct sunlight. It is recommended to keep it in a cool, dry, and well-ventilated area, ideally at room temperature (20–25°C). Prevent contamination by storing separately from incompatible substances, and ensure the storage space is secure and appropriately labeled.
    Application of 19-Norandrostenediol

    Applications of 19-Norandrostenediol in Industrial Manufacturing

    19-Norandrostenediol serves as an important intermediate in multiple regulated sectors, enabling precise synthesis and modification of steroid compounds for authorized downstream products in controlled environments. We supply high-purity material to support advanced manufacturing processes under strict compliance protocols.

    1. Pharmaceutical Steroid Active Ingredient Synthesis

    Pharmaceutical companies use this intermediate for manufacturing anabolic-androgenic steroid APIs. Controlled environments require precise management of reaction pathways, especially for C-19 demethylation processes to construct norsteroid frameworks. These APIs undergo further purification, esterification, and crystallization before inclusion in prescription medicines. Production environments must prevent cross-contamination and ensure complete traceability for end-product batch record compliance.

    Industry compliance standards

    • Current Good Manufacturing Practice (cGMP - ICH Q7)
    • United States Pharmacopeia (USP)
    • European Pharmacopoeia (Ph. Eur.)
    • DEA Control (where scheduled substances apply, e.g., US 21 CFR Part 1308)

    Typical usage ratio

    • Ranging from 1–5% molar ratio as starting intermediate, adjusted according to the target molecule yield requirements and reaction scale.

    Downstream process integration

    • Intermediate introduction during the core ring construction stage.
    • Engagement in selective reduction, oxidation, and esterification reaction steps.
    • Isolation by solvent extraction and crystallization prior to final API finishing.
    • Analytical verification by HPLC/GC for structure confirmation.

    Final product types

    • Pharmaceutical-grade nandrolone steroid APIs (e.g., nandrolone decanoate, nandrolone phenylpropionate).
    • Relevant norsteroid derivatives for authorized parenteral and oral dosage forms.

    2. Veterinary Injectable Formulation Manufacturing

    Regulated veterinary pharmaceutical manufacturers utilize the compound as a precursor for anabolic agent APIs. Formulations require documented batch traceability due to national and regional controls on steroid veterinary medicines. Formulators synthesize, purify, and further process the intermediate into oil-based steroid injectables for livestock and animal health applications under sterile manufacturing conditions. All processing must align with local veterinary registration requirements.

    Industry compliance standards

    • VICH Good Manufacturing Practice (GMP) Guidelines
    • US FDA CVM Guidance for Industry
    • European Medicines Agency (EMA) veterinary medicine rules
    • Relevant national animal health substance controls (e.g., China Ministry of Agriculture)

    Typical usage ratio

    • 0.7–4% w/w in blend, depending on injectable API content and animal dosage form specifications.

    Downstream process integration

    • Feeds directly into multi-step semi-synthesis for conversion to veterinary norsteroid API.
    • Dissolution and filtration before sterile filtration and aseptic filling into vial or ampoule formats.
    • In-process control by TLC and potency assays prior to release.

    Final product types

    • Injectable anabolic steroid solutions for livestock production management.
    • Animal health maintenance and veterinary performance-use formulations.

    3. Reference Standard Preparation for Analytical Laboratories

    Accredited reference material producers and laboratory chemical suppliers prepare calibration substances using this intermediate. Preparations involve rigorous purification, verified by multi-method analytical techniques, to ensure precise quantification in residue analysis and forensic toxicology. The production cycle includes aliquot standardization, homogeneity testing, and certified value assignment according to ISO principles.

    Industry compliance standards

    • ISO 17034 Reference Material Production
    • ISO/IEC 17025 Testing Laboratory Accreditation
    • Standard Reference Material (SRM) protocols - NIST, European JRC
    • FDA/EMA analytical method validation guidelines

    Typical usage ratio

    • Typically standardized at 1 mg–100 mg per solution/vial, based on calibration curve requirements of end-user laboratories.

    Downstream process integration

    • Purification through prep-HPLC or sublimation for certified reference material certificates.
    • Value assignment with independent chemical and mass spectrometry characterization.
    • Sealing and stability testing prior to international shipment.

    Final product types

    • Certified reference ampoules for HPLC and GC analysis in regulatory laboratories.
    • Analytical standards for drug residue and food safety monitoring.

    4. Functional Steroid Derivatives Development for Chemical Research Institutes

    Specialty chemicals divisions and research institutions carry out methyl group modification and structure-activity studies using this norsteroid intermediate. Controlled handling protocols involve gram-to-multigram batch reactions in closed laboratory units. Research efforts often focus on developing analytical standards, metabolic studies, or new catalyst systems for synthetic organic chemistry publications or patent applications.

    Industry compliance standards

    • Local laboratory chemical handling protocols (e.g., COSHH in the UK, OSHA in the US)
    • Inventory tracking per DEA or local substance control regulations for restricted compounds
    • ISO 9001 quality systems for chemical research material production
    • Institutional review board (IRB) or academic committee oversight for substance use

    Typical usage ratio

    • Use levels start from 0.05 g to multi-gram scale per reaction, adjusted according to target research objectives and laboratory throughput capabilities.

    Downstream process integration

    • Directly introduced as molecular precursor in research synthesis modules.
    • Applied in targeted reaction schemes examining hydrogenation, functional group manipulation, or ring closure studies.
    • Processed under closed-system laboratory fume hoods with certified containment.
    • Waste managed as controlled organic chemical residue per institutional protocols.

    Final product types

    • Novel functionalized norsteroid molecules for pharmacological, biochemical, or metabolic pathway analysis.
    • Intermediates for further medicinal chemistry innovation.
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    Competitive 19-Norandrostenediol prices that fit your budget—flexible terms and customized quotes for every order.

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    Certification & Compliance
    More Introduction

    19-Norandrostenediol: A Closer Look from a Manufacturer’s Perspective

    Introduction to 19-Norandrostenediol

    Working on the synthesis of 19-Norandrostenediol involves as much discipline in bench chemistry as it does in overseeing the technical details and quality of every batch. Producing this prohormone demands more than tightly controlled conditions; it also requires a nuanced understanding of market requirements and regulatory shifts. 19-Norandrostenediol (often referenced by chemists for its structural relationship to other androgens) is a compound developed with specific use in mind: lean mass support in research and analytical environments. Our facility has dedicated resources to establish consistent methods that strip away noise and variability, focusing on purity at every stage.

    Molecular Structure and Properties

    The principal draw with 19-Norandrostenediol comes from its chemical profile: it features two additional hydrogen atoms compared to its cousin nandrolone, and differs from testosterone by the absence of a methyl group at position 19. In our lab, we work with the structure C18H28O2 and control crystalline forms to support stability. As trained chemists, we tend to look for clarity in reports and spectral data, with NMR and GC-MS results confirming low ranges of related impurities. It’s evident from our R&D notebook entries that our methods go well beyond simple dissolution and filtration.

    Batch Quality and Analytical Methods

    Every batch starts with strict raw material auditing. Our QC staff pulls from past experience with androgenic intermediates, catching minor inconsistencies by running TLC and HPLC before the main process even begins. Each synthesis follows a track chosen after hundreds of trials—one of our old glass reactors still wears a white etching from a catalyst test gone wrong. Now, each production run includes spot checks for melting point, water content, and chiral purity, bridging the gap between qualitative and reproducible results. Final quality metrics often show >99% purity, but numbers alone never satisfy the in-house team unless spectral overlays are clean.

    Specification Details as Handled in Production

    We’ve refined specification controls through years of lot verification. Most of our output for this compound falls as a white-to-off-white crystalline powder, with slight batch-dependent hue adjustments based on partner labs’ feedback. The melting range holds tight near 120–127°C. Water content falls below 0.5%, as kept by Karl Fischer titration, and assay levels sit above 98.5% via HPLC area normalization. Residual solvents have never exceeded ICH Q3C guidelines, and foreign matter is unexplored in our records due to our open powder-room policies. Our logs and certificates archive run deep, but it’s the lived routine— from chemical weighing to vacuum packing —that keeps those numbers honest.

    Production Process and Hands-On Challenges

    Turning out batches of 19-Norandrostenediol has shown us the limits of common vessel linings and stirred us to tweak process steps, particularly during hydrogenation. In the early days, we noticed even tiny shifts in stirring speed changed the final yield, reminding us that instruments and touch never fully replace each other. Tedious TLC after each purification step, then repeated loss-on-drying checks, built in the certainty we chase. A chemist’s cassette of handwritten yield calculations rarely survives long, but muscle memory for solvent removal and crystallization persists. Our post-synthesis protocols revolve not just around compliance, but around an ingrained suspicion of any deviation we see—whether that means a trace of odor, odd color, or variance in filter cake consistency.

    Comparisons with Related Compounds

    Among the team, comparisons to other prohormones remain a frequent shop-floor debate. 19-Norandrostenediol holds an edge over its methylated siblings like methyltestosterone, mostly because methylation at C-17 introduces liver stress and leads to complaints about solubility, even in tightly regulated research conditions. Some developers ask for plain nandrolone or its decanoate ester, but the enzymatic pathway of 19-Norandrostenediol sidesteps direct androgenic aggression, drifting closer to how the body naturally manages these molecules after administration. Other prohormones such as 4-Androstenediol can't match the lack of 19-methyl group effects, leading to side-chain metabolites most labs want to avoid in clean studies.

    We maintain transparency on specs and origins, unlike narrow-spectrum manufacturers who chase only profit margins. 19-Norandrostenediol's standout characteristic in our eyes is its potential for predictable, streamlined conversion through aromatase and 5α-reductase pathways, reducing the heap of byproducts downstream. From a chemical viewpoint, this helps the research context maintain focus on core outcomes, minimizing blips associated with non-target metabolites. Output always tracks closely to intended reference standards, so any drift pulls process owners directly onto the production floor, not just the QA chair.

    Handling, Packaging, and Shipping Insights

    Finishing each batch doesn’t stop at final filtration; handling deserves as much patience as production itself. We store and ship raw powder in multi-layer containers—double-sealed polyethylene pouches in airtight drums, flushed with inert gas. Our oldest technician jokes about “powder ghosts” left in ordinary plastic, so the drum linings now go through a full anti-static wipe-down before filling. Humidity plays tricks on the loose powder, so we box shipments only during dry periods—no rush jobs over weekends or rainy days, since moisture can shift the surface sheen. Routine in-house training avoids careless exposure during repacking, always with a focus on health and safety measures practiced on the floor instead of written in a distant procedural handbook.

    Regulatory and Market Considerations

    Producing 19-Norandrostenediol pushes us to monitor changing regulatory stances worldwide. The compound’s legal status continues to evolve, particularly across North America and the EU. Some regions have shifted it into more heavily regulated categories, which means our batch records, chain of custody, and end-user declarations carry extra administrative weight. We’ve learned, often through costly audits, that full traceability on every shipment heads off regulatory headaches before they begin. Supply chain transparency isn’t a mere fashion statement—it’s a blunt reality if you want to maintain long-term supply contracts. Our team responds to these pressures by keeping transparent documentation open for review at every audit.

    Process Optimization and Cost Control

    Chemical manufacturing offers few shortcuts when balancing premium quality with competitive costs. High purity raw materials command higher up-front investment, but we’ve unwound many a fake “savings” maneuver by later reworking batches that cut corners. Oversight sometimes means rewriting facility SOPs after an outlier result, but as margins compress, careful input market analysis constantly guides our sourcing. Some years, rising hydrocarbon costs pinch suppliers first, then trickle down as supplier audits force us to check and recheck sub-tier sources. Our process optimization doesn’t end with the reaction vessel—it stretches to energy-saving initiatives, scheduled downtime for cleaning, and in-house waste solvent recycling. Training shifts each month to account for process bottlenecks, often flagged by our own operators long before they surface in management reports.

    Environmental Impact Management

    Responsibility for environmental stewardship goes beyond paperwork and mandatory monitoring. We treat every solvent— IPA, THF, and DCM most often— through on-site distillation for reuse or safe disposal. Spill management drills cover everything from minor leaks to full drum failures, because one uncontained solvent pool can set compliance efforts back a year. Our older staff carry with them the lessons of more lenient eras, but today’s team works shoulder-to-shoulder with process safety engineers and external inspectors. Wastewater scrubbers, stack filters, and non-ionizing radiation monitors operate on planned schedules. Company-wide meetings flag upcoming legal changes, dissect incident reports, and push for new methods that reduce byproducts at the source instead of relying only on end-pipe controls.

    Conversations with Clients and Researchers

    Fielding questions about 19-Norandrostenediol specs and handling requirements rarely fits a scripted response. Many researchers drive deeper into process specifics—a handful even request GC-MS chromatograms from each lot. We open our records when asked, sometimes even hosting calls with clients to walk through purification steps or packaging procedures. Sincerity from our technical team— not just marketing lines —has built the trust most of our customers rely on. Few misunderstandings survive a direct line to a process chemist, and recurring clients remember names as much as they do unit weights on an invoice. Concerns about alternate supply, parallel imports, or “gray market” stocks come straight to us, and every flagged out-of-spec sample leads quickly to internal tracing, not just an apology letter.

    Supply Chain and Traceability

    Each drum and inner bag leaving our site carries a unique identifier connected to a full production record and certificate history. That sequence starts in procurement and runs through final loading at the dock, with checkpoints that cross-verify time, temperature, and handling staff at every handoff. We audit these controls internally at least twice per year, often more if supply chain turbulence causes upstream interruptions. Counterfeit risk sits high on our radar; surprise external audits and isotopic batch testing blunt this risk before it impacts our partners. Keeping every link tight, right down to transport fleet and customs clearance details, holds our standard up against the “fast-and-loose” approach that many smaller or offshore producers still take.

    Risks Management and Contingency Practices

    We’ve witnessed how disruptions— weather, politics, raw material shortfalls— can constrict supply overnight. Planning doesn’t just mean keeping extra stock; it means mapping sources in advance and maintaining working relationships with alternative suppliers ready to pass our full vetting process. Mandated risk reviews catch blind spots we’d otherwise miss. Emergency SOPs, updated every quarter, spell out who does what if delays strike. Lessons learned after past storms or customs interventions have gone directly into the playbook, creating real backup scenarios that stand up when the unexpected hits. Listening to operator feedback sharpens this system: solutions grow from the shop floor, not top-down mandates.

    Technological Investment and Continuous Improvement

    Chasing higher purity or yield always runs parallel with investments in data acquisition, analytics, and process controls. Our last shift to PLC-based monitoring let us catch process drift in near-real time. Daily logs now feed into cloud-based records, cross-referenced against historical standards for that batch type. Everyone in the team— from new apprentices to seasoned hands —reads from the same digital book and sees outlier data before the end of production. Changes in probe calibration, pump output, or even staff rotation schedules become visible to all, which cuts waste and strengthens root cause analysis after every exception report.

    Advancements in Analytical Validation

    Manufacturing 19-Norandrostenediol is not a static process. Each year, new analytical equipment brings better control. Two years ago, we adopted ultra-high performance liquid chromatography (UHPLC), reducing run time and supporting faster turnaround on in-process purity checks. Automated data capture from spectral instruments reduced transcription error and enabled tighter trending of quality data batch-over-batch. Retrospective studies surfaced unexpected patterns in certain impurity profiles—our troubleshooting sessions now track “micro-drifts” that used to fall outside spec sheets. Full transparency on these results with our long-term clients led to more predictable performance once applied in research or pilot-scale synthesis.

    Training, Retention, and Operator Knowledge

    It’s tempting to view chemical output as a function of technical infrastructure alone. Yet, even small mistakes in powder weighing, temperature logging, or filter consistency can propagate flaws. Our training modules cover more than basic safety, from day one hands-on trial work to structured SOP walkthroughs. Veteran process leaders lead small groups in regular troubleshooting clinics—not just formal, once-a-year refreshers. Employees at every level can pause a run if something looks or feels wrong, triggering a structured review and process-improvement cycle that refines future runs. Recognition for sharp observations and honest error reporting builds a stronger plant culture, more than any poster or slide could accomplish.

    Product Application and Research

    Most requests for 19-Norandrostenediol center on research or preclinical development, often focused on lean-mass modulation or metabolic pathway analysis. Labs value high-purity, contaminant-free material that can be traced to a single accountable source. The material’s ease of conversion by mammalian cell enzymes into active metabolites opens paths for controlled studies on androgen signaling, all without the metabolic cost of added methyl groups. Scientists running dose-response or pathway tracing studies rely on lot-to-lot constancy—something only true batch discipline can ensure. We’ve supported direct collaboration with research groups, helping to tailor intermediate purity or supply small custom batches for time-sensitive research windows.

    Questions about the compound’s behavior versus others—especially in layered matrix studies or animal models—push us to keep refining our process. Our technical team participates in industry conferences, sharing anonymized data and learning from broader case studies. The feedback loop with the research community goes long beyond a single purchase; it steers our ongoing improvement, both in analytical focus and process robustness. In-house pilot studies support process tweaks, with each new finding cross-checked by QA and technical consultants before integration into standard production flow.

    Limitations, Challenges, and the Path Forward

    Producing research-grade 19-Norandrostenediol for the global market brings no guarantees for plain sailing. Access to precursors sometimes runs afoul of regulatory red tape, forcing planning cycles that stretch longer than comfortable. Documentation and chain-of-custody resources pull technical team members into administrative detail, sapping workflow focus. Market shifts roll through in cycles, with bulk buyers sometimes prioritizing cost over trust—and finding out too late that cut corners multiply longer-term headaches.

    As a manufacturer, the most durable edge comes from discipline in the process; every corner skipped and record fudged guarantees a future problem. Buyers who treat chemical supply as a short-term or commodity play rarely stick around, coming back only when patch-up work elsewhere runs dry. In contrast, teams who dig deep into process, validation, and transparent reporting build a reserve of resilience. There are no one-and-done wins, just a steady return of discipline at every level, from sourcing to filling, from training to shipment. The chemical industry may shape-shift, but the value in repeatable, honest process execution compounds across cycles, markets, and regulatory environments.

    Summary: The Role of the Manufacturer

    From inside the plant walls, every detail of 19-Norandrostenediol production serves a singular aim: authentic, robust chemical supply, delivered without compromise. Production stands on the skills and judgment of real people— operators, analysts, logisticians — who focus daily on safe technique, testing, and honest reporting. Long-term partners expect more than labels and certificates; it’s the daily grind, the traceable tweak, and the sheer predictability of a disciplined process that sets the standard. As chemistry evolves, so does the expectation of stewardship, transparency, and shared technical progress.