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4-Fluoro-DL-Tryptophan

    • Product Name 4-Fluoro-DL-Tryptophan
    • Alias 4-F-DL-Trp
    • Einecs 235-763-6
    • 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

    335882

    Productname 4-Fluoro-DL-Tryptophan
    Casnumber 2524-06-5
    Molecularformula C11H11FN2O2
    Molecularweight 222.22
    Appearance Off-white to light yellow solid
    Purity Typically ≥98%
    Meltingpoint 240-245°C (dec.)
    Solubility Slightly soluble in water
    Synonyms DL-4-Fluorotryptophan
    Storagetemperature 2-8°C
    Smiles c1cc2c(cc1F)c(c[nH]2)CC(C(=O)O)N
    Iupacname 2-amino-3-(4-fluoro-1H-indol-3-yl)propanoic acid

    As an accredited 4-Fluoro-DL-Tryptophan factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Sealed amber glass vial labeled "4-Fluoro-DL-Tryptophan, 1 gram," with hazard symbols, lot number, and storage instructions on the box.
    Shipping 4-Fluoro-DL-Tryptophan is shipped in secure, clearly labeled containers, compliant with transportation and safety regulations for chemicals. Packaging ensures protection from moisture and light. Shipping includes proper documentation and, where required, temperature control. Delivery is handled by certified carriers specialized in hazardous materials to minimize risk and ensure safe, prompt arrival.
    Storage 4-Fluoro-DL-Tryptophan should be stored in a tightly sealed container, protected from light and moisture. Keep at 2-8°C (refrigerated). Store in a well-ventilated area, away from incompatible substances such as strong oxidizers and acids. Avoid prolonged exposure to air. Label clearly and follow standard laboratory safety protocols when handling or storing the compound.
    Application of 4-Fluoro-DL-Tryptophan

    Applications of 4-Fluoro-DL-Tryptophan in Industrial Manufacturing

    As the original manufacturer of 4-Fluoro-DL-Tryptophan, we supply this specialty amino acid derivative to select downstream markets where its fluorinated structure delivers proven functional value. Our technical support is grounded in detailed, real-world application knowledge drawn from years of supplying to regulated industries and assisting with customer formulation and QA integration.

    1. Pharmaceutical Intermediates for Fluorinated API Synthesis

    Leading pharmaceutical companies employ 4-Fluoro-DL-Tryptophan as a building block for the synthesis of investigational small-molecule active components, especially in the creation of fluorinated analogues for enhanced metabolic stability and receptor selectivity. The compound typically enters early-stage route design for serine protease inhibitors, metabolic pathway probes, and several next-generation serotonin receptor modulators, where accurate traceability and control of enantiomeric purity are critical throughout process development, scale-up, and validation.

    Industry compliance standards

    • ICH Q7 GMP for active pharmaceutical ingredient manufacturing
    • FDA 21 CFR Part 210/211 (for US API facilities)
    • EU EudraLex Volume 4 (for EU facilities)
    • USP/NF and Ph. Eur. monographs for amino acid derivatives where applicable

    Typical usage ratio

    • Ranges from 0.2 to 2.5 molar equivalents per API batch synthesis step, depending on target fluorinated compound and required yield; stoichiometry is adjusted based on side-chain reactivity and downstream purification constraints.

    Downstream process integration

    • Charged during the fragment coupling or alkylation stage of heterocyclic core assembly or as a coupling partner in amide/ester bond formation; subsequent purification utilizes preparative HPLC or crystallization before final API conversion and QC characterization.

    Final product types

    • Small-molecule APIs containing fluorinated indole or tryptophan motifs
    • Advanced intermediates for pharmaceutical research and clinical trial materials
    • Radio-labelled precursors for clinical imaging agents

    2. Peptide Drug Development and Fluorinated Peptide Synthesis

    Contract peptide manufacturers and biotechnology researchers incorporate 4-Fluoro-DL-Tryptophan into synthetic peptides for the study of protein folding, receptor binding, and metabolic stability. The unique electronic properties of the fluorine atom within the indole ring facilitate structure-activity relationship (SAR) studies and experimental peptide therapeutics that require modified aromatic amino acids, especially for non-natural backbone design.

    Industry compliance standards

    • ISO 9001:2015 quality management for peptide production
    • GMP guidelines for investigational peptide drugs (ICH Q7, EMA, and FDA specifics for clinical materials)
    • FDA Guidance for Industry: ANDAs for Synthetic Peptide Drug Products
    • USP General Chapter <1047> for peptide APIs

    Typical usage ratio

    • Used at 1 to 3 residues per peptide chain, translating to concentrations from 0.5% up to 10% (w/w) in solid-phase or solution-based peptide synthesis, depending on the peptide length and the desired modification site frequency.

    Downstream process integration

    • Incorporated as a protected amino acid derivative (often Fmoc-4-fluoro-DL-tryptophan) during automated solid-phase peptide synthesis (SPPS); after resin cleavage and deprotection, peptides undergo preparative HPLC purification and mass spectrometry-based identity verification.

    Final product types

    • Modified peptide drug candidates for preclinical or clinical evaluation
    • Labeled peptide probes for biochemical and biophysical research
    • Therapeutic peptide APIs incorporating non-standard residues

    3. Life Science Research Reagents for Protein Structure Analysis

    Suppliers to structural biology and biochemistry laboratories use 4-Fluoro-DL-Tryptophan in microbial fermentation and in vitro transcription-translation systems for the isotopic or fluorinated labeling of proteins. Its distinctive spectroscopic and NMR properties help elucidate protein conformations, folding pathways, and interaction dynamics, making it indispensable in mechanistic enzyme research, protein engineering, and pharmaceutical discovery programs where site-specific indole modification enables advanced analytical studies.

    Industry compliance standards

    • ISO 13485:2016 (where applicable for diagnostic research reagents)
    • GMP for research use only (RUO) biochemical reagents
    • OECD Best Practice Guidelines for Biological Resource Centers
    • Applicable local biosafety standards (BSL-1/BSL-2 reagents)

    Typical usage ratio

    • Typically supplied in concentrations of 0.1 to 1.0 mM for cell-free systems, or 20–100 mg/L supplementation for microbial expression; precise concentration determined by protein expression level, incorporation efficiency, and extent of isotopic/fluorine labeling required by the research protocol.

    Downstream process integration

    • Added to growth media or protein expression platforms (E. coli, yeast, or in vitro synthesis) at the designated amino acid feed stage; incorporated into target proteins during translation; proteins then isolated by chromatographic methods for downstream crystallography or NMR analysis.

    Final product types

    • Fluorinated and/or isotopically labeled recombinant proteins for X-ray crystallography and NMR spectroscopy
    • Specialty research reagent kits for academic and industrial protein analysis
    • Analytical control materials for protein structure-function investigation

    4. Fluorescent and Bioorthogonal Probe Synthesis

    Specialty fine chemical producers utilize 4-Fluoro-DL-Tryptophan in the production of custom bioorthogonal labels and advanced fluorescent probes used in cellular imaging, bioconjugation, and high-throughput screening. The presence of the fluorine atom enables selective labeling reactions and modulates the indole’s photophysical properties, supporting the synthesis of fluorinated tryptophan analogues designed for protein tagging and enzyme activity detection in drug discovery and molecular diagnostic workflows.

    Industry compliance standards

    • ISO 9001:2015 for fine chemical manufacturing
    • ISO/IEC 17025 for analytical characterization of labeling reagents
    • REACH and TSCA compliance for probe distribution
    • Material Safety Data Sheet (MSDS) and GHS labeling standards

    Typical usage ratio

    • Introduced at 1–20% (w/w) of total amino acid or dye intermediate mass during synthetic or bioconjugation steps; dosage is tailored for desired probe intensity, labeling density, and downstream application sensitivity in analytical platforms.

    Downstream process integration

    • Utilized in the initial step of probe synthesis either through direct coupling or intermediate formation with specialty dyes, biosensors, or chemical reporters; incorporated through solution or solid-phase protocols followed by rigorous chromatographic purification and spectroscopic validation.

    Final product types

    • Site-specific fluorescent labeling kits for protein detection
    • Bioorthogonal chemical probes for click chemistry and bioconjugation assays
    • Diagnostic reagent standards for flow cytometry and fluorescence microscopy
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    Certification & Compliance
    More Introduction

    Introducing 4-Fluoro-DL-Tryptophan: Reliable Quality from Direct Production

    Our Direct Approach to 4-Fluoro-DL-Tryptophan Manufacturing

    At our facility, we concentrate on mastering the subtleties of tryptophan derivatives, and 4-Fluoro-DL-Tryptophan has steadily drawn attention in both research and industry applications. Behind this compound stands years of investment in refining the synthesis sequence, maintaining reliability batch after batch. The DL isomeric mixture offers broader scope than the L-form alone. Direct experience with both chemical synthesis and purification helps us ensure performance in the lab and manufacturability on a larger scale.

    Many move through intermediaries for sourcing such fine chemicals, but nothing replaces the knowledge gained by being hands-on from raw materials to crystalline solids. In handling fluorinated amino acids, our process design leaves room for strict quality checks, especially to maintain stereochemistry integrity and avoid contamination that could throw off biochemical assays. This practical manufacturing oversight matters in research settings where small variabilities translate into larger problems.

    Genuine Product Consistency Direct from Source

    Researchers rely on 4-Fluoro-DL-Tryptophan for protein engineering, receptor binding assays, and metabolic studies. The fluoro substitution—attached at the 4-position of the indole—introduces unique biochemical behaviors not seen in unsubstituted tryptophan. Incorporation in peptide synthesis can shed light on how subtle electronic changes impact fold and function, and the DL configuration enlarges the experimental window.

    Years spent dialing in the final crystallization step capture our practical focus. We do not just analyze bulk powder for basic purity. We analyze for isomeric composition, residual solvent, and post-synthetic trace impurities, all measured by orthogonal techniques. Purity values reach beyond just numbers on a certificate; they represent years of troubleshooting at the benchtop and the pilot reactor scale. The market outside the direct producer often offers material that fluctuates in moisture content or crystal habit, and minor batch variations skew sensitive research outcomes. Our team addresses these inconsistencies at their origin rather than post-hoc, building trust with institutions and industrial R&D labs.

    Seeing Differences Beyond Catalog Descriptions

    Superficial summaries do not reveal what sets 4-Fluoro-DL-Tryptophan apart. Fluorination brings both increased metabolic stability and altered aromatic character. Proteins synthesized with this analog may resist degradation more robustly or display subtle shifts in fluorescence, measurable by high-sensitivity detection methods. These phenomena cannot come from standard amino acids or from lower-purity batches that introduce extraneous signals or unpredictable behaviors.

    Our direct manufacturing allows us to optimize not just for chemical identity, but for batch-to-batch predictability. Many in the field have dealt with lot-to-lot discrepancies: one week a peptide synthesis works, and the next the product stalls in purification. We trace these headaches to hidden impurities occasionally tolerated in looser production settings. By controlling every stage, false positives or negatives in downstream research decrease dramatically. Scientists working with custom proteins or peptide therapeutics appreciate predictable responses. Our end-benefit remains simple: clean material gives repeatable results, safeguarding research projects from frustrating reruns.

    Manufacturing Controls that Shape Laboratory Outcomes

    Tryptophan itself—the canonical amino acid—plays central roles in protein folding and enzyme activity. With a strategic fluoro atom substitution, new dimensions of structure and reactivity open up. Synthesis of 4-Fluoro-DL-Tryptophan hinges on reliable access to safe fluorination reagents, high-purity indole starting materials, and meticulous post-reaction workups. Where we benefit as manufacturer is direct oversight of hazardous handling steps, so our batches do not show byproducts derived from over-fluorination, failed protection group strategies, or incomplete purification.

    Each production run includes hands-on supervision, not just automated monitoring. This means catching unexpected shifts in color, particle size, or solubility, and using experience, not just instrumentation data, to determine suitability. We prioritize precision in the drying and storage of the compound, as fluorinated tryptophans show heightened sensitivity to certain atmospheric conditions. Our controlled storage reduces risk of hydrolysis or surface oxidation—issues that silently change compound profile long before shipment reaches the end user.

    Direct Impact on Biological Research and Applied Fields

    Synthetic biologists, protein chemists, and biophysical researchers are pushing the boundaries of what's known about protein structure–function relationships. 4-Fluoro-DL-Tryptophan gives these innovators another tool for modifying peptides and enzymes. The introduction of the fluoro group tunes hydrophobicity, π-stacking, and hydrogen bonding patterns. This is not theoretical: collaborating research groups have reported altered receptor affinities and improved resistance to enzymatic degradation by switching to our consistent product.

    Some partner institutions have shared feedback from in vivo and in vitro experiments showing that even small discrepancies in DL content or trace impurities can introduce artifacts in fluorescence readings or influence protein folding pathways. Our meticulous handling has reduced these aberrations, encouraging repeat experimentation and faster progress to publication. Pharmaceutical and biotech start-ups, under tighter regulatory review, benefit from sourcing the compound directly from a source that not only tracks each intermediate but also provides transparent documentation traceable to the actual manufacturing line.

    Beyond Purity: Usability and Customization

    Working directly with production rather than buying further down the supply chain means we can tune bulk properties of 4-Fluoro-DL-Tryptophan. Our process enables us to engineer the final product for ease of weighing, solution making, or lyophilization. We devote time to understanding why certain particle sizes dissolve faster in aqueous solutions, which matters for automated liquid handlers used in high-throughput screening. Requests for custom packaging or tailored drying cycles do not pose challenges, because our technical staff maintains practical flexibility.

    By keeping one foot in active production and another in day-to-day application, we make sure our offerings reflect real lab needs. Sodium content and residual chlorides remain low, so as not to interfere with downstream peptide syntheses. Water content is consistently verified, with loss on drying measured every batch, saving users the headache of desiccation or variable solution preparation. We avoid supplying material that has spent months in ambient warehouses, sidestepping slow hydrolysis and guaranteeing shelf life based on transparent data.

    Direct Answers to Common Usage Questions

    Sourcing 4-Fluoro-DL-Tryptophan can bring anxiety if prior experience involves inconsistent suppliers or spotty technical support. As manufacturer, our insight covers not just supplying the chemical, but also practical advice learned from years of troubleshooting and supporting research partners. Questions such as solubility in various buffers, stability under acidic conditions, or peeling apart isomeric forms come up regularly. Our on-site chemists do not refer clients to third parties; we answer from experience and often reproduce the exact conditions in-house to verify protocol compatibility.

    The D- and L-forms in our mixed product serve different roles in biological applications. Some protein engineering experiments benefit from the wider chemical landscape created by both enantiomers, expanding possibilities for backbone conformations or resistance to natural enzymatic recycling. Our manufacturing process prevents cross-contamination from other amino acids, avoiding misleading biological results.

    Supporting Evolving Applications and Responding to User Needs

    Pharmaceutical teams developing enzyme inhibitors, agricultural technologists testing resistance factors in plants, and diagnostic companies designing new tracer molecules all look to unique amino acid analogs for a technical edge. By producing 4-Fluoro-DL-Tryptophan under our direct control, we make it easier to adapt to unique requests that don't fall into a one-size-fits-all format. This could mean orders for larger custom batches, solvent-free isolation for certain analytical techniques, or shipment under inert gas for highly sensitive lines of research.

    We have responded to upticks in demand triggered by academic publications showcasing new uses for 4-Fluoro tryptophans, implementing process upgrades rather than rationing from limited supply. Our response times and ability to tweak batch specifications stem from in-house experience, not drawn-out communication up and down a reseller chain.

    Benefits Over Commodity Sourcing

    Direct relationship with production means better batch transparency and the ability to incorporate urgent quality feedback. Many companies simply pass along the traits of their suppliers, risking information gaps about real process controls. Our documentation is built from firsthand observation, not paperwork copied along a chain. When a research scientist calls due to an odd NMR result or an unexpected failure in a control assay, we take genuine pride in tracing root causes and sending detailed corrective steps.

    Our investment in analytical labs means results can be more than just paper. We run method validation for each lot using up-to-date mass spectrometry, chiral chromatography, and spectroscopic checks—every check designed around the characteristics of fluorinated indoles. Regular feedback from industrial development teams helps us refine what we supply, driving product refinement over the years.

    Safety, Handling, and Ethical Accountability

    Working at scale with 4-Fluoro-DL-Tryptophan brings responsibility. Our chemists and technicians manage every step under strict compliance with safety protocols. Handling fluorinating agents requires respect for hazards and environment. We have installed fail-safes in our exhaust, solvent handling, and personnel protection practices. Every drum, intermediate flask, and final package benefits from this attention to health and safety—not just for our staff but for end-users with unique sensitivities.

    Researchers trust direct producers who value transparency. Each shipment leaves our facility with full traceability and no gaps in documentation. As we scale up to meet international demand, we have integrated systems for traceable waste management, solvent recycling, and energy consumption reporting. This groundwork meets regulatory scrutiny and aligns with ethical standards in modern chemistry.

    Building on Strong Track Record

    We have watched the landscape for niche amino acid analogs shift dramatically. Trends influence what chemicals earn attention—yet consistency and reliability outlast fads. Our commitment to producing 4-Fluoro-DL-Tryptophan reflects not just technical ability, but enduring relationships with academic groups and industrial teams who rely on dependable inputs. Repeat business, strong technical feedback, and published research referencing direct product sources evidence this trust.

    Manufacturers who stay involved all the way from initial synthesis to final delivery build more resilient supply chains. Our experience supports customers through unforeseen technical or regulatory hurdles. If an application calls for custom analysis, nonstandard lot tracking, or experimental advice, we act from our hands-on familiarity and not from filtered, generalized responses. Much of this approach comes from direct time in the lab among those using the product—both at the benchtop and the process vessel scale.

    Looking Ahead: Innovation Rooted in Practice

    At the intersection of practical chemistry and scientific advancement, 4-Fluoro-DL-Tryptophan represents both a technical challenge and a catalyst for discovery. We take pride in enabling teams to push beyond textbook peptides and simple biochemistry, providing robust and responsive access to this fluorinated analog. Our continual process improvements, informed by customer-driven research, keep us at the forefront of specialty amino acid manufacturing.

    Feedback from users often feeds back directly into our process modifications. Reaction conditions, final drying, and even packaging formats shift as new projects suggest improvements. We maintain frequent dialogue with bench chemists and automation teams, adapting faster to emerging instrumentation needs. The practical, detailed attention paid at the manufacturing stage enables real progress on the scientific front lines.

    Why Direct Manufacturing Stands Apart in Specialty Chemicals

    Experience-driven manufacturing lines shape the real scientific value of 4-Fluoro-DL-Tryptophan. Our connection to the product’s entire lifecycle—sourcing, synthesis, purification, packaging—lets us provide thorough and technically accurate support. This perspective solves problems quickly, incorporates reliable user feedback, and consistently delivers a product suited to advancing the next generation of biological and materials research. Investing in our own process infrastructure, analytical capability, and customer engagement, we keep practical benefits front and center, making a difference beyond neutral catalog entries and middleman transactions.