Procure analytically validated active pharmaceutical ingredients, research peptides, and specialized intermediates with full batch COA, HPLC, and GC-MS documentation.
A rigorous industrial perspective on evaluating fluorinated steroid API manufacturers, impurity controls, and international supply continuity.
Fluoxymesterone (9α-fluoro-11β,17β-dihydroxy-17α-methylandrost-4-en-3-one) requires stereospecific introduction of fluorine at the C-9 position. Top-tier manufacturers utilize low-temperature electrophilic or nucleophilic fluorination protocols to eliminate β-epimer side reactions and minimize dehydrofluorinated degradation analogs below ICH Q3A thresholds.
Commercial lots for institutional laboratories and licensed formulators must strictly comply with USP and European Pharmacopoeia (EP) standards. Key release criteria include chromatographic purity ≥98.5% (HPLC), residual solvents under ICH Class 2/3 limits (GC-FID), heavy metal residues ≤10 ppm, and specific optical rotation [α]D within +104° to +112°.
With stringent global controls over anabolic-androgenic steroid intermediates, procurement teams encounter severe bottlenecking if upstream steroidal precursor supply chains fail. Leading suppliers maintain backward-integrated synthesis from 11α-hydroxyandrostenedione, guaranteeing uninterruptible enterprise batch delivery schedules.
Enterprise procurement specifications establishing critical quality attributes (CQAs) for high-grade Fluoxymesterone solid crystalline powder.
| Analytical Parameter | USP / EP Reference Standard | Manufacturer In-House Release Specification | Validation Method |
|---|---|---|---|
| Chemical Name | 9α-Fluoro-11β,17β-dihydroxy-17α-methylandrost-4-en-3-one | Conforms to Structure | 1H/13C-NMR & HRMS |
| CAS Registry Number | 76-43-7 | 76-43-7 Verified | Official Registry Cross-Check |
| Molecular Formula & Weight | C20H29FO3 | 336.44 g/mol | 336.44 ± 0.05 Da | High-Resolution Mass Spectrometry (ESI-MS) |
| Physical Appearance | White or practically white crystalline powder | White crystalline microfine powder, odorless | Visual & Organoleptic Inspection |
| Identification (IR / UV) | Concordant with Fluoxymesterone reference standard | Max absorption concordance at λ ∼240 nm | FTIR Spectrophotometry & UV-Vis Assay |
| Specific Optical Rotation ([α]D) | +104.0° to +112.0° (at 20°C, c=1 in ethanol) | +106.5° to +109.0° | Automated Polarimetry (Sodium D-line) |
| Chromatographic Purity (HPLC) | ≥97.0% to 102.0% (anhydrous basis) | ≥99.0% (Single Impurity ≤0.20%) | RP-HPLC (C18 Column, UV detection @ 240nm) |
| Related Substances (Impurities A, B, C) | Individual unknown ≤0.5%; Total ≤2.0% | Individual ≤0.15%; Total impurities ≤0.80% | Gradient RP-HPLC coupled with DAD |
| Melting Point Range | Decomposes at approximately 240°C | 238°C – 242°C (with decomposition) | Capillary Melting Point System (Mettler Toledo) |
| Loss on Drying (LOD) | ≤1.0% (dried at 105°C for 3 hours) | ≤0.45% | Thermogravimetric Analysis / Halogen LOD |
| Residue on Ignition / Sulfated Ash | ≤0.2% | ≤0.08% | Muffle Furnace Ashing @ 600°C |
| Residual Solvents (ICH Q3C) | Methanol ≤3000ppm, Acetone ≤5000ppm, DCM ≤600ppm | Total VOC ≤800ppm; DCM not detected (<10ppm) | Headspace Gas Chromatography (GC-HS/FID) |
Analyzing key structural shifts in fine-chemical raw material supply, legislative frameworks, and enterprise risk diversification.
Traditional batch fluorination reactions involving aggressive halogenating agents like Olah's reagent (HF-pyridine) or Selectfluor present significant thermal runaway hazards and variability in isomeric purity. Advanced API synthesis facilities are transitioning to continuous micro-flow reactors. This enables ultra-precise residence time control, reducing the formation of over-fluorinated degradation isomers and delivering uniform crystal morphology batch after batch.
Fluoxymesterone is subject to stringent international monitoring as a Controlled Substance (Schedule III in the USA, Class C in the UK, and strictly monitored under INCB conventions). International enterprise purchasers must operate within secure, fully documented supply corridors featuring End-User Declarations (EUD), import/export quota verification, and multi-tier customs brokerage compliance to prevent legal seizure or border forfeiture.
In analytical chromatography laboratories, reference standards for Fluoxymesterone and its metabolic markers (e.g., 9α-fluoro-17,17-dimethyl-18-norandrost-13-en-11β-ol) are in persistent demand for forensic pathology, anti-doping bioassays, and veterinary metabolic profiling. Manufacturers offering deuterated or 13C-labeled internal standards alongside bulk primary APIs command strategic market advantages.
Global pharmaceutical corporations are under ESG mandate to minimize the environmental footprint of steroid manufacturing. The synthesis of fluorinated corticosteroids and androgens traditionally produces toxic fluoride effluent and heavy solvent waste. Certified suppliers are investing in closed-loop solvent recovery distillers, catalytic halogen recyclers, and enzymatic biocatalysis for intermediate stereoselective hydroxylations.
How top-tier Fluoxymesterone manufacturers eliminate delivery risks across North American, European, and Asia-Pacific customs corridors.
Tier-1 manufacturers maintain active Drug Master Files (Type II DMF) with the US FDA and CEP documentation with EDQM. Complete validation packages, including stability data under ICH Q1A(R2) conditions (25°C/60% RH and accelerated 40°C/75% RH), facilitate seamless regulatory approval for contract manufacturing partners.
To insulate overseas laboratories from unpredictable freight interruptions, strategic chemical suppliers maintain climate-regulated regional replenishment hubs across Frankfurt, Chicago, and Hong Kong. This enables 48-to-72 hour dispatch of analytical reference batches without extensive customs dwell time.
Fluoxymesterone raw powder is hermetically sealed in multi-layer antistatic barrier pouches lined with virgin polyethylene, evacuated under inert nitrogen, and placed within heavy-gauge fiber drums with unalterable tamper-evident serialized security seals, preserving dryness and physical integrity during oceanic or air transit.
To satisfy rigorous procurement quality audits, verified suppliers collaborate with independent ISO/IEC 17025 accredited analytical laboratories. Split-sample testing certificates verifying identity by GC-MS, potency by HPLC, and microbial bioburden ensure complete downstream reliability before container sealing.
An in-depth metallurgical and chemical engineering breakdown of industrial Fluoxymesterone preparation from microbial fermentation precursors.
Synthesis initiates via the bioconversion of androst-4-ene-3,17-dione (4-AD) or progesterone utilizing Rhizopus nigricans or Aspergillus ochraceus strains. This enzyme-mediated bio-step regioselectively introduces the crucial 11α-hydroxyl group with over 92% conversion efficiency, avoiding costly, non-selective synthetic chemical oxidations.
The 11α-hydroxy intermediate undergoes mesylation or tosylation followed by base-catalyzed elimination to generate the Δ9(11)-olefinic steroid core. Subsequent treatment with organic peracids (e.g., mCPBA) or hypobromous acid (HOBr) yields the 9β,11β-epoxide or the 9α-bromo-11β-hydroxy bromohydrin, laying the structural groundwork for trans-diaxial opening.
Stereospecific nucleophilic ring-opening of the 9β,11β-epoxide with anhydrous hydrogen fluoride (HF) in coordinating solvents (e.g., tetrahydrofuran or pyridine) installs the 9α-fluoro and 11β-hydroxy groups in a pristine trans-diaxial orientation. Organometallic Grignard addition (CH3MgBr) at C-17 completes the 17α-methyl-17β-hydroxy configuration, delivering raw Fluoxymesterone.
Operating temperature during the anhydrous HF ring-opening step must be maintained strictly between −15°C and −5°C. Deviations exceeding 0°C accelerate the dehydration of the 11β-hydroxy group, forming the unwanted 9α-fluoro-Δ11-dehydro analog (Impurity C), which cannot be efficiently removed by simple crystallization and significantly diminishes lot recovery yields.
Essential compliance, analytical, and supply chain verification standards every corporate procurement director must validate before vendor qualification.
Do not accept plain COAs presenting generic tabular purity percentages. Require raw high-resolution RP-HPLC chromatograms showing baseline separation, retention times, peak area integration tables, and diode array spectral purity metrics for all detectable peaks above the 0.05% reporting threshold.
Due to the aggressive fluorination reagents employed during steroid processing, insist on quantitative testing for inorganic fluoride ions via ion chromatography (IC) or fluoride-selective electrode, ensuring free fluoride levels remain below 10 ppm to avert container glass etching or product degradation.
Validate that the manufacturing plant operates in full adherence to ISO 9001:2015 quality management systems, and where applicable for pharmaceutical-grade contracts, cGMP ICH Q7 guidelines. Review past regulatory audit histories, inspection deficiency letters (483s), and corrective action reports.
Verify whether the vendor is an authentic primary synthesis facility or an unverified re-packager. Request written transparency regarding the origin of key starting materials (specifically 4-AD and 11α-OH-AD) to guard against intermittent delivery cessations caused by secondary supplier bankruptcies.
For large-scale international B2B purchases, establish contracts backed by commercial letters of credit (L/C) or verified chemical escrow agreements where payments are released exclusively upon independent laboratory certificate confirmation at the port of customs arrival.
In oral solid dosage formulations, Fluoxymesterone's exceptionally low aqueous solubility requires careful particle engineering. Determine whether the manufacturer offers customized micronization (e.g., D90 < 10 μm) with laser diffraction particle size distribution (PSD) reporting.
Authoritative technical, legal, and operational answers addressing the most common inquiries from corporate buyers and formulation chemists.
Fluoxymesterone is officially registered under CAS 76-43-7 with the IUPAC designation (8S,9R,10S,11S,13S,14S,17S)-9-fluoro-11,17-dihydroxy-10,13,17-trimethyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one. It is cataloged under the USP and European Pharmacopoeia as an androgenic and anabolic steroid active pharmaceutical ingredient.
The primary related impurities include 11-dehydrofluoxymesterone (oxidation product at C-11), 9α-fluoro-Δ11-dehydro-17α-methyltestosterone (elimination product from excessive thermal exposure), and unreacted 9β,11β-epoxide precursors. Certified manufacturers maintain individual levels of each impurity below 0.15% via advanced preparative recrystallization.
The highly electronegative 9α-fluorine atom exerts a strong electron-withdrawing inductive effect across the steroidal framework, stabilizing the adjacent 11β-hydroxyl group against enzymatic oxidation into a 11-keto functionality and markedly enhancing oral bioavailability and androgen receptor binding affinity compared to unfluorinated methyltestosterone.
Every commercial production shipment is accompanied by a comprehensive regulatory dossier including the Certificate of Analysis (COA) with actual HPLC/GC-MS traces, Material Safety Data Sheet (MSDS/SDS) compliant with GHS, Certificate of Origin (COO), Non-Asbestos & BSE/TSE statements, and Residual Solvent Declarations adhering to ICH Q3C guidance.
Fluoxymesterone bulk powder should be preserved in light-resistant, airtight containers protected from direct moisture and thermal radiation. The ideal long-term storage temperature is 20°C to 25°C (68°F to 77°F) with excursions permitted between 15°C and 30°C. Repeated moisture condensation must be avoided to prevent esterification or microbial proliferation.
Yes. Leading chemical synthesis facilities possess specialized cleanroom jet-milling equipment capable of tailoring micronization profiles from standard crystalline grades down to uniform ultrafine particle regimes (D50 < 5 μm, D90 < 10 μm), accompanied by wet or dry laser diffraction Malvern particle size distribution certificates.
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Whether your institution requires milligram-scale certified analytical reference standards with detailed 1H/19F-NMR and HRMS interpretation or multi-kilogram commercial pilot batches compliant with strict USP monographs, partner with verified manufacturing facilities equipped with end-to-end analytical traceability, direct factory pricing, and seasoned regulatory export logistics.
