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Girard'S Reagent P

    • Product Name Girard'S Reagent P
    • Alias 2,4-Dinitrophenylhydrazine
    • Einecs 216-630-4
    • 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
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    Specifications

    HS Code

    795506

    Name Girard's Reagent P
    Chemical Formula C6H13N3O2S
    Molecular Weight 191.25 g/mol
    Cas Number 129-09-1
    Appearance White to off-white crystalline powder
    Solubility Water Soluble
    Melting Point 182-185 °C
    Storage Conditions Store at room temperature, keep container tightly closed
    Synonyms 1-Carboxymethylpyridinium chloride hydrazide; Girard reagent P chloride
    Application Used for the derivatization of carbonyl compounds in analytical chemistry

    As an accredited Girard'S Reagent P factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Girard's Reagent P is supplied in a sealed amber glass bottle, containing 25 grams, with hazard labeling and product information.
    Shipping Girard’s Reagent P is typically shipped in tightly sealed containers to prevent moisture absorption and degradation. It should be handled as a hazardous chemical, with appropriate labeling and documentation. Shipping must comply with relevant regulations, protecting the product from extreme temperatures, physical damage, and exposure to incompatible substances during transit.
    Storage Girard’s Reagent P should be stored in a tightly sealed container, away from light and moisture, in a cool, dry, and well-ventilated area. It is sensitive to air and moisture, so desiccation is recommended. Keep away from incompatible substances such as strong oxidizers. Proper labeling and adherence to laboratory safety protocols are essential for safe storage.
    Application of Girard'S Reagent P

    Applications of Girard'S Reagent P in Industrial Manufacturing

    Girard'S Reagent P is an established hydrazine-based derivative widely recognized for its selectivity in organic synthesis and analytical separations. As a direct manufacturer, we address process-critical sectors by supporting qualified downstream user demands across chemical, pharmaceutical, and analytical workflows. The applications detailed below reflect real industrial use by licensed operators, focusing on application-specific formulation and compliance requirements.

    1. Steroid and Bile Acid Derivatization for HPLC/MS Analysis

    Analytical laboratories use Girard'S Reagent P to derivatize carbonyl-containing steroids and bile acids before HPLC or mass spectrometric analysis. This procedure enhances detection sensitivity and improves separation for low-abundance analytes in complex biological or pharmaceutical samples. Preparation involves careful dissolution in methanol or acetonitrile, followed by immediate reaction with target analytes under controlled temperature and pH. Stringent batch QC ensures the reagent provides reproducible derivatization yields for reference and clinical standards.

    Industry compliance standards

    • USP General Chapter <825> for radiopharmaceuticals (for quality control derivatization)
    • EN ISO/IEC 17025 (testing and calibration laboratory accreditation)
    • FDA 21 CFR Part 58 (GLP requirements for laboratories)

    Typical usage ratio

    • 0.1–2.0 mg reagent per 1 mL reaction volume, depending on analyte concentration. Adjust according to specific carbonyl substrate load and derivatization protocol.

    Downstream process integration

    • Post-extraction addition during sample prep.
    • Reaction at controlled temperature (20–40°C).
    • Followed by injection into HPLC/MS systems.

    Final product types

    • Certified reference materials (CRM), calibration solutions
    • Clinical research samples for endocrinology and metabolic profiling
    • Pharmaceutical bioanalytical dossiers

    2. Pharmaceutical Active Pharmaceutical Ingredient (API) Structural Elucidation

    In pharmaceutical R&D and API manufacturing, chemists utilize Girard'S Reagent P for the selective conversion of ketone-containing intermediates into hydrazones. This step assists in both purification and NMR/MS structure confirmation during final impurity profiling or process validation. The reagent's high reactivity minimizes side-product formation, facilitating accurate identification and control of synthesis intermediates as required by international pharmacopoeia standards.

    Industry compliance standards

    • ICH Q3A/B (Impurities in New Drug Substances/Products)
    • European Pharmacopoeia (Ph. Eur.) monographs for APIs
    • FDA cGMP, 21 CFR Part 210/211 (API manufacturing)

    Typical usage ratio

    • 0.5–4.0 molar equivalents relative to carbonyl group in the intermediate. Range determined by substrate reactivity and scale in pilot or production batches.

    Downstream process integration

    • Direct introduction after reaction work-up of the crude API.
    • Short incubation under mild acid catalysis, monitored by TLC or LC-MS.
    • Removal by liquid-liquid extraction prior to downstream crystallization/filtration.

    Final product types

    • Pharmaceutical reference standards
    • Structural identification samples for regulatory submission
    • In-process control samples in API plants

    3. Aldehyde and Ketone Group Protection in Specialty Organic Synthesis

    Fine chemical and R&D labs use Girard'S Reagent P to temporarily mask sensitive aldehyde and ketone moieties during multi-step organic syntheses. The formation of hydrazone derivatives allows for selective sequential reactions and deprotection in later stages. This application is prevalent in assembling peptidomimetics, oligosaccharide building blocks, and heterocyclic intermediates for industrial materials and advanced pharmaceuticals.

    Industry compliance standards

    • ISO 9001:2015 (quality management for chemical synthesis)
    • REACH Registration (raw material and process safety)
    • OECD GLP for discovery chemistry workflows

    Typical usage ratio

    • Stoichiometric or slight reagent excess (1.0–1.2 equivalents vs. carbonyl group). Quantity optimized for substrate and solvent polarity.

    Downstream process integration

    • Addition to crude reaction mixture following oxidation or condensation steps.
    • Removal by acid hydrolysis or chromatographic techniques after next transformations.
    • Integration within solid-phase or flow-synthesis systems.

    Final product types

    • Protected intermediate compounds for drug discovery
    • Specialty monomers for materials science
    • Chemical libraries for screening platforms

    4. Preparation of Water-Soluble Hydrazones for Bioconjugation Applications

    Life sciences companies deploy Girard'S Reagent P in bioconjugation to create hydrazone linkers with improved aqueous solubility. This property facilitates easier conjugation of biomolecules such as proteins, peptides, and polysaccharides to labels or carriers. The reagent forms stable, water-soluble hydrazone derivatives, essential for downstream manufacturing of diagnostic agents and antibody-drug conjugates. Process development requires validated removal of excess reagent to meet residual solvent and QC specifications.

    Industry compliance standards

    • ISO 13485 (medical device quality systems)
    • FDA 21 CFR Part 820 (quality system regulations for devices and diagnostics)
    • USP <1043> (ancillary materials for cell, gene, and tissue-engineered products)

    Typical usage ratio

    • 0.1–2.5 molar equivalents per biomolecule. Fine-tune based on protein load and coupling efficiency targets.

    Downstream process integration

    • Solution-phase reaction at neutral or slightly acidic pH (5–7).
    • Batch purification of bioconjugates by size-exclusion or affinity chromatography.
    • QC testing for hydrazone stability and functional group conversion.

    Final product types

    • Antibody-drug conjugates (ADC) intermediates
    • Biolabeling reagents
    • In-vitro diagnostic (IVD) test components

    5. Derivatization for Environmental and Food Residue Analysis

    Accredited environmental and food laboratories employ Girard'S Reagent P for derivatization of trace aldehydes and ketones during the analysis of water, foodstuffs, and air samples. The resulting hydrazones facilitate improved extraction and quantification by GC/MS or LC/MS, crucial for regulatory compliance and risk assessment. Method development includes validation for different matrices and compatibility with standardized residue monitoring workflows.

    Industry compliance standards

    • EPA SW-846 Method 8315A (carbonyl compounds analysis)
    • European Commission Decision 2002/657/EC (residue analysis methods)
    • ISO/IEC 17025 (analytical quality assurance)

    Typical usage ratio

    • 0.05–1.0 mg/mL sample, depending on matrix and regulatory detection limits. Optimization based on target analyte concentration.

    Downstream process integration

    • Post-extraction addition directly to aqueous or organic samples.
    • Incubation at room or low temperature (4–25°C) for specific time periods.
    • Followed by extraction or direct injection into chromatographic analysis.

    Final product types

    • Treated environmental water and air samples
    • Food residue test extracts
    • Analytical reports for regulatory authority submission

    6. Chemical Modification in Functional Material Synthesis

    Producers of advanced specialty materials utilize Girard'S Reagent P for functionalization of polymers and resins with aldehyde or ketone units. This reaction imparts improved hydrophilicity and ionic properties to the finished materials, helping fine-tune characteristics such as ion exchange capacity, biological compatibility, or sensor signal transduction. Industrial processing employs controlled small-batch protocols to ensure reproducibility in function-critical material lots.

    Industry compliance standards

    • ISO 9001:2015 (quality system for specialty materials manufacturing)
    • EU REACH, Title IV (downstream user safety assessment and SDS requirements)
    • Rohs/ELV compliance (for electronics and automotive applications)

    Typical usage ratio

    • 0.2–1.5 wt% relative to resin bulk. Titrated depending on functional group density and material end-use specification.

    Downstream process integration

    • Addition to polymer melt or resin solution during modification phase.
    • In-process monitoring of derivatization extent by spectroscopic methods.
    • Post-reaction purification or casting as required by application.

    Final product types

    • Ion-exchange resins
    • Sensor active films and coatings
    • Functional monomer intermediates for electronics
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    Certification & Compliance
    More Introduction

    Introducing Girard'S Reagent P: Precision Meets Practical Chemistry

    Understanding the Value of Girard'S Reagent P in the Laboratory

    In our daily manufacturing, accuracy, safety, and repeatability shape every batch of Girard’S Reagent P that leaves our factory. Chemists depend on reactants that do exactly what they claim, without introducing new uncertainties or unnecessary troubleshooting. Meeting that demand goes beyond purity—it’s about giving researchers something they can trust, every order, every time. Over the decades, we have learned that simple molecules often unlock complex chemistry. Girard'S Reagent P speaks to this principle; it works simply and predictably, but delivers transformative results for anyone who needs to modify or identify carbonyl compounds with agility and clarity.

    The day-to-day reality of organic synthesis rarely feels glamorous. It’s about handling the small challenges that crop up: stubborn impurities, inconsistent reactivity, hard-to-separate byproducts, or simply the need to waste hours on tweaking protocols that should just work. Many of our long-term customers running carbohydrate analysis, steroid quantification, or aldehyde/ketone purification have told us how much time unreliable reagents used to cost them before they adopted Girard'S Reagent P. One laboratory manager at a major university remarked that switching to our reagent cut their sample prep time by half and reduced their reliance on repeated purification, saving not just money but also precious research momentum.

    Efficient fractionation or detection in a real-world analytical workflow leans heavily on how a reagent behaves—not just in ideal cases, but in everyday, messy ones. Our technicians on the shop floor remain directly engaged with questions and feedback from users of Girard’S Reagent P. From those exchanges, we've continuously adapted our process to produce a reagent that easily dissolves in water or methanol, thanks to the affinity of its hydrazide group and the presence of trimethylammonium. Its crystalline, free-flowing solid form comes in a consistent particle size to ensure uniform mixing. We keep each lot traceable back to the raw inputs. Every order comes with more than a COA—a sense of accountability that users recognize and appreciate.

    The Science at the Core: What Makes Girard’S Reagent P Unique

    In practical chemistry, the details set a tool apart. Girard’S Reagent P stands out for its role in forming hydrazone derivatives from otherwise reactive and sometimes troublesome carbonyl compounds: mostly aldehydes and ketones. You quickly discover that direct detection or separation of these groups, especially in complex samples, often involves lengthy or inefficient steps. Here, Girard’S Reagent P takes on a starring role. Its quaternary ammonium functionality boosts water solubility—transforming once-difficult purifications into straightforward aqueous phase separations. That single molecular tweak, compared with more basic hydrazines or semicarbazides, allows even novice users to achieve faster, cleaner results, particularly during extraction or column chromatography.

    An experienced chemist working on clinical diagnostics shared that Girard'S Reagent P improved their steroid quantification protocols over the older Girard'S Reagent T. The key difference comes down to the nature of the quaternary group: Girard'S Reagent P’s trimethylammonium moiety brings distinct water solubility, whereas Girard'S Reagent T, with its pyridinium ring, performs better under certain nonaqueous conditions but introduces more matrix effects for some samples. By trusting the tailored features of Girard'S Reagent P, laboratories streamline their workflows for specific applications in biological or food sample analysis, or any setting where small sample quantities demand high sensitivity.

    Every bottle of our Girard'S Reagent P passes stringent QC that covers everything from melting point to loss on drying and assay by titration. Over time we've listened to requests from both small-scale investigators and bulk pharmaceutical clients, so our product offers flexibility—available in research or industrial scales, with packaging that meets safety and storage needs across different climates. We maintain full transparency about batch records and supply chain traceability. Customers who require documentation for regulatory audits receive detailed explanations of process and purity, not just rubber-stamped certificates.

    Daily Realities: How Our Reagent Solves Real Problems

    In our own internal applications testing, Girard’S Reagent P stands out for tasks like Newborn Screening, Vitamin D3 quantification, and in metabolomics studies where rapid, robust carbonyl capture defines project success. We support these studies not with empty claims but with hard data—testimonials from partners in the field who faced real challenges, and published literature where Girard’S Reagent P played a pivotal role. In one university’s food chemistry lab, an investigator traced flavor compounds at parts-per-billion levels, using the reagent to tag even small quantities of reactive aldehydes without losing analytes to volatilization or side reactions. Their results helped push analytical limits, opening up new possibilities for quality assurance in the food industry.

    Users in several hospital and clinical labs report that our reagent handles complex plasma or serum samples with little interference. More than once, customers recommended tweaks to our recrystallization protocol; their insights shaped continuous improvements to the product you receive today. We are proud of this direct feedback loop with working scientists. It tells us the real issues—like batch-to-batch variability, caking, or inconsistent flow rates—are addressed before any bulk order rolls out. If scales shift from gram-level batch synthesis to hundreds of kilograms a month for pharmaceutical production, our technical teams stand ready. They guide users through scale-up questions, helping to anticipate process subtleties that generic technical notes rarely touch.

    Safety remains a central concern. While Girard’S Reagent P avoids the harsh toxicity profile of many older hydrazine derivatives, we still respect proper PPE, dust control, and storage in sealed, moisture-tight containers. Workplace safety isn’t negotiable. Our own crews adopt the procedures we recommend: gloves, dust masks, well-ventilated rooms, and emergency eyewash on standby. We do more than ship product; we foster responsible chemistry from floor to bench, in every lab our materials enter.

    Comparing Girard’S Reagent P and Other Reagents

    Girard'S Reagent P is not the only choice for hydrazone formation, but it’s become many chemists’ preferred choice for specific tasks. Competition includes 2,4-dinitrophenylhydrazine (DNPH), Girard’S Reagent T, and various semicarbazide reagents—each brings strengths and limitations. Where Girard’S Reagent P succeeds is its unique side chain, ensuring water solubility and a basic environment that accelerates reaction rates at mild neutral conditions. Some hydrazines bring more selectivity or colorimetric detection, but they increase hazards or complicate downstream handling. DNPH, for example, delivers vivid color and straightforward aldehyde/ketone detection, but it creates insoluble hydrazones often problematic in later purifications. Semicarbazides, another staple, offer gentler handling but often lag in reactivity and demand more ruthlessly controlled conditions to avoid inconsistent yields.

    Users working in fields like metabolic profiling or drug analysis commonly run both Girard’S reagents head-to-head. The take-home message across reports is clear: Girard’S Reagent P stands apart for bio-analytical uses, especially where aqueous compatibility boosts recovery and separates low-level analytes from heavier matrix burdens. Its structural cousin, Girard’S Reagent T, delivers robust performance in more organophilic systems and sometimes carries a cost advantage on market. Yet for those tackling routine sample prep across liquid chromatography, food safety, or clinical environments, the unique hydrophilicity of Girard’S Reagent P wins out again and again. This practical edge reflects a real difference in outcomes, not just a subtle chemical distinction on a label.

    Over decades of feedback and fieldwork, we've refined every step from raw reagent mixing to bottling and transport. That commitment means our Girard’S Reagent P doesn’t just meet an analytical need—it fulfills strict customer requirements for performance, reliability, and clear logistical support.

    Usage Insights from Manufacturing to Bench

    After years in direct chemical manufacturing, we’ve seen countless methods for using Girard'S Reagent P. The simplest approach involves straightforward mixing in aqueous methanol, or even just distilled water, followed by direct addition to the sample. Users avoid exotic solvents or dangerous byproducts, streamlining both small-scale prep and large-volume applications. In-process quality checks on the factory side catch any crystallization irregularities, ensuring users don’t contend with stubborn lumps or slow solution rates.

    Our bulk customers appreciate the rigid packing and sealing systems, which eliminate wicking and moisture uptake. Small research batches lean on our ready-made ampoule packaging, which preserves reagent quality for sensitive analytical work. In a rising trend, environmental chemists now deploy Girard’S Reagent P for tracking persistent carbonyl pollutants, relying on its consistent performance to reach new detection thresholds. Those customers need not just a well-tested reagent, but clear, prompt technical advice when protocols run into old or new obstacles. We maintain close relationships through personalized troubleshooting, open technical logs, and an honest willingness to admit—often to our own learning—that even small details make a big difference.

    It’s the real-world results that count. In the food industry, rapid identification of spoilage markers often relies on the unique hydrazone derivatives formed with our reagent. Producers can act quickly on reliable results, reducing waste and improving safety. Meanwhile, pharmaceutical partners developing new carbonyl-based drugs apply Girard’S Reagent P to support structure elucidation, impurity tracking, and stability testing; every sample, every chromatogram, becomes clearer and more actionable thanks to the reagent’s tailored properties. These documented successes flow back into our manufacturing process, driving improvements customer by customer and batch by batch.

    Continuous Improvement Based on Direct Customer Input

    Our decades in the industry have taught us never to become complacent about process or product. Every week, questions come in regarding shelf stability, compatibility with new instrumentation, or variations in color or melting point among different lots. We don’t just file away this feedback. R&D teams immediately investigate, adjusting crystallization protocols or adding an extra screening step to root out contaminants, before the next round of production kicks off. More than half our technical improvements over the past three years originated from direct user feedback—a fact we celebrate and encourage among new staff.

    Recently, a group of metabolomics specialists approached us with concerns about trace metal contamination affecting LC-MS sensitivity. After an internal audit and process overhaul, we tweaked our raw material sourcing and extended purification. The result: subsequent lots tested cleaner, and customer satisfaction improved. These stories play out again and again, whether the suggestion comes from academic fields, commercial QA, or small biotech startups. The shared goal stays constant: offer a truly reliable, flexible, and straightforward solution for analytical chemists everywhere.

    Users depend on open communication. Our technical hotline does more than field calls; we engage in real dialogue about protocol tweaks, sample storage, or methods to get the cleanest possible hydrazone derivatives. In a recent global supply chain crunch, continual updates ensured no customer was left waiting or guessing. Protecting research progress and industrial output aligns with keeping our team agile and responsive at every touchpoint—no matter where the next batch is headed.

    Building Future Applications Using Girard’S Reagent P

    The evolution of analytical chemistry keeps us on our toes. As new detection strategies hit the market, Girard’S Reagent P finds new niches—supporting everything from aroma analysis in fine wine development to new classes of biosensors. Each novel use-case calls for the same reliable baseline: a batch-tested, fully traceable reagent that lets experimenters push the boundaries of what’s detectable and how quickly new results reach the market.

    Innovation doesn’t spring from isolated breakthroughs; it grows from ongoing partnerships with scientists pushing chemistry in new directions. Many high-impact research publications cite the use of Girard’S Reagent P in early-stage discovery or routine monitoring, offering new researchers a pathway to replicate and extend their findings. Beyond academic labs, regulatory authorities occasionally call with batch verification or inquiries about new labeling. These requests drive accelerated updates in process and formulation, ensuring product remains one step ahead of evolving analytical demands.

    We support those efforts by offering custom batch runs, tailored sizes, and documentation packages to fit any regulatory landscape, whether users operate under ICH, GMP, or are fortifying their own internal QA regime. Flexibility in our production pipeline means fast turnarounds for unique projects—the reality of modern chemistry demands nothing less.

    Honest Reflections from Years in the Field

    Making chemicals is more than meeting a set of numbers on a COA. The gap between “analytical grade” and a truly useful reagent comes down to every operator, every technician, every customer who gives honest feedback and expects real improvement. Girard’S Reagent P represents this philosophy. We've watched it go from a specialty item for a handful of researchers, to a global workhorse for biomarker discovery, food safety, and pharmaceutical QC.

    Our team faces the same day-to-day realities as every user: pressure to keep up with demand, supply chain hurdles, maintaining quality through changing raw material markets, and never cutting corners for speed at the cost of reliability. Honest manufacturing comes down to accountability—we know every bottle has someone’s experiment, or even someone’s patient sample, riding on it. For those reasons, process validation, technical documentation, and customer support share equal footing with batch testing.

    Our close ties with the scientific community have taught us humility and resolve. We share real-world troubleshooting advice, practical SOPs, and time-saving tips because we’ve faced those bottlenecks too. By focusing on the chemist’s experience at the bench, not just the “spec,” we keep Girard’S Reagent P up to the highest standard, batch after batch.

    Choose Girard’S Reagent P for Trusted Results

    Relying on a chemical manufacturer means trusting that product today will match product tomorrow—especially when findings and deliverables rest on that certainty. Girard’S Reagent P brings a track record built from continuous engagement, adaptation, and the everyday realities of organic analysis and sample prep. From clinical diagnostics to food safety and emerging research frontiers, the reagent’s unique profile makes the daily work just that much easier, safer, and more reliable. Our relationships—with you, the scientist—make each batch better. We look forward to seeing how your next discovery puts Girard’S Reagent P to work and shapes the future of analytical chemistry.