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Phenazopyridine Hydrochloride

    • Product Name Phenazopyridine Hydrochloride
    • Alias Pyridium
    • Einecs 200-204-7
    • 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

    321240

    Generic Name Phenazopyridine Hydrochloride
    Drug Class Urinary tract analgesic
    Chemical Formula C11H12N5•HCl
    Molecular Weight 249.71 g/mol
    Appearance Orange to red crystalline powder
    Mechanism Of Action Local analgesic effect on urinary tract mucosa
    Indications Relief of urinary tract pain, burning, irritation, and discomfort
    Route Of Administration Oral
    Usual Adult Dose 100-200 mg three times daily after meals
    Contraindications Renal impairment, hypersensitivity to phenazopyridine
    Common Side Effects Headache, dizziness, upset stomach, urine discoloration
    Pregnancy Category Pregnancy Category B

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

    Packing & Storage
    Packing Phenazopyridine Hydrochloride, 100 mg tablets, 100-count bottle. Orange plastic container with child-resistant cap and clear pharmaceutical labeling.
    Shipping Phenazopyridine Hydrochloride should be shipped in tightly sealed, properly labeled containers, protected from light and moisture. Transportation must comply with relevant regulations for hazardous chemicals, ensuring no exposure to heat or incompatible substances. All Safety Data Sheet (SDS) documentation should accompany the shipment to ensure safe handling and emergency response if needed.
    Storage Phenazopyridine Hydrochloride should be stored in a tightly closed container, protected from light and moisture. Keep it at controlled room temperature, ideally between 20°C and 25°C (68°F–77°F). Store in a dry, well-ventilated area away from incompatible substances. Ensure the container is clearly labeled and kept out of reach of unauthorized personnel, children, and animals.
    Application of Phenazopyridine Hydrochloride

    Applications of Phenazopyridine Hydrochloride in Industrial Manufacturing

    As a dedicated manufacturer, we supply phenazopyridine hydrochloride to regulated downstream sectors where its functional properties support specialized formulation and processing demands. The following application scenarios reflect current industrial practice, highlighting precise formulation roles, compliance frameworks, integration steps, and finished product specifications adopted by downstream partners.

    1. Pharmaceutical Manufacturing – Oral Urinary Analgesic Tablets

    Pharmaceutical companies incorporate phenazopyridine hydrochloride into the manufacture of prescription and OTC urinary analgesic tablets to provide symptomatic relief for dysuria. The raw material enters the direct compression or wet granulation phase during solid dosage formulation, handled under GMP protocols to ensure potency and uniformity. Downstream users optimize the concentration according to regional pharmacopoeial monograph requirements for finished dosage forms registered for urinary tract discomfort treatment.

    Industry compliance standards

    • United States Pharmacopeia (USP)
    • European Pharmacopoeia (Ph. Eur.)
    • Good Manufacturing Practice (ICH Q7, 21 CFR Parts 210/211, EU GMP Annex 13)
    • Health Canada (C.01.017, Prescription Drug List regulations)

    Typical usage ratio

    • 0.19%–0.32% of finished tablet weight, corresponding to 95–200 mg per unit dose; adjusted based on target market registration and product label claims

    Downstream process integration

    • Mixed with excipients during powder blending, then compacted by direct compression or pre-granulated, followed by tablet pressing and film coating

    Final product types

    • Oral immediate-release tablets (95 mg, 100 mg, 200 mg strength)
    • Film-coated tablets for retail pharmacy and hospital channels

    2. Bulk Powder Compounding for Hospital Pharmacists

    Hospital pharmacy compounding units procure pharmaceutical-grade phenazopyridine hydrochloride for preparing extemporaneous powder formulations used in tailored urinary analgesic prescriptions. Pharmacists use verified compounding procedures, often blending the API with inert carriers for oral suspensions for pediatric or geriatric patients unable to swallow tablets. Compounding workflow strictly adheres to clinical and pharmacy standards for batch traceability and patient safety.

    Industry compliance standards

    • USP Chapter <795> – Pharmaceutical Compounding—Nonsterile Preparations
    • ASHP Guidelines on Compounding Sterile Preparations
    • State Board of Pharmacy regulations (US/Canada/EU)
    • Hospital pharmacy QA systems (e.g., ISO 15189 for medical laboratories)

    Typical usage ratio

    • 0.1%–0.25% by mass within oral powder blends, formulated per prescriber directive and patient dosing requirements

    Downstream process integration

    • Measured into compounding beakers, triturated with selected diluents (e.g., lactose monohydrate), and dispensed into unit-dose packaging or suspension bottles

    Final product types

    • Oral powder sachets for reconstitution
    • Syrups and liquid suspensions for clinical pharmacy units

    3. Research and Development Supply – Reference Standards and Analytical Controls

    Analytical laboratories, contract research organizations, and pharmaceutical manufacturers rely on phenazopyridine hydrochloride as an analytical reference substance for ongoing R&D, quality control (QC) validation, and method development. Purity and traceability are key, as the material is weighed and spiked into sample matrices or calibration curves for chromatographic and spectrometric assay validation. Regulatory filings require reference traceability and certificate of analysis alignment with global monographs.

    Industry compliance standards

    • USP Reference Standards Program
    • European Pharmacopoeia Reference Standards (BRP/CRS)
    • ISO/IEC 17025:2017 (General requirements for testing/calibration laboratories)
    • ICH Q2(R1) Validation of Analytical Procedures

    Typical usage ratio

    • 0.01%–0.1% (100–1,000 µg/mL in analytical solution); adjusted per assay sensitivity and standard curve requirements

    Downstream process integration

    • Direct weighing into analytical vials or solution preparation, dissolved in specified solvents, and included in batch QC, release testing, and stability studies

    Final product types

    • Pharmacopoeial reference standards
    • Analytical controls for finished product testing
    • Internal quality benchmark samples distributed to global QC labs

    4. Veterinary Pharmaceutical Preparations – Oral Formulations for Companion Animals

    Veterinary drug manufacturers use phenazopyridine hydrochloride in compounded oral dosage forms designated for symptomatic urinary tract discomfort in dogs and cats. These applications require careful dosage calibration and veterinary regulatory compliance, with integration during dosage form blending and strict batch characteristic controls. Documentation supports traceability and veterinarian prescription history within animal health supply chains.

    Industry compliance standards

    • FDA Center for Veterinary Medicine (CVM) Guidance for Industry
    • VICH GL3 (Stability Testing of New Vet Drug Substances)
    • EU Regulation 2019/6 on veterinary medicinal products
    • Good Manufacturing Practice for Veterinary Products (China, EMA)

    Typical usage ratio

    • 0.018%–0.09% per finished dose, calculated according to animal species, weight, and veterinarian prescription requirements

    Downstream process integration

    • Blended with palatable base excipients, processed using wet granulation or microencapsulation, and pressed into flavored chewable tablets or oral powder blend

    Final product types

    • Chewable veterinary tablets (e.g., for companion animals)
    • Oral veterinary powder sachets or flavored suspensions
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    Certification & Compliance
    More Introduction

    Introducing Phenazopyridine Hydrochloride: Our Approach to Consistent Quality

    What Sets Our Phenazopyridine Hydrochloride Apart

    Producing Phenazopyridine Hydrochloride every day brings unique challenges and responsibilities. Our factory teams rely on techniques refined through years of hands-on work—adjusting conditions batch by batch to deliver a quality level trusted by pharmaceutical partners. Phenazopyridine Hydrochloride finds its primary role as a urinary tract analgesic. Every step, from weighing raw intermediates through controlled synthesis, defines whether a batch meets both internal standards and those set by global regulators. Consistency in appearance, solubility, and purity reflects vigilant oversight—operators and technical staff constantly sample and adjust to keep within narrow margin parameters.

    What often goes unseen is how production reality shapes the final product. Laboratory-scale synthesis offers predictability, but transfer to industrial reactors asks for real-time judgment. The moisture sensitivity of intermediate stages, combined with thermal stability checks, can’t be captured through theoretical analysis alone. Technicians regularly inspect for subtle changes—color shift, crystallization rate, or filtration time—because these small factors compound over hundreds of runs. The strongest testament to our process control comes from repeat pharmaceutical clients who, over time, report dependable results downstream in their own formulations.

    Pharmaceutical manufacturers face direct pressure from regulatory scrutiny, especially when it comes to identifying and quantifying impurities. During each campaign, we target a content level for the active ingredient between 98.0% and 102.0% as established by pharmacopeial monographs. Our in-house HPLC and titration suites run analysis on each batch, and technical chemists tune the process to ensure the presence of impurities sits well below accepted thresholds. Water content and loss on drying occupy a separate quality check lane, as both can impact product stability during storage and in final compression. Achieving uniform particle size means operators must balance mechanical milling with the avoidance of dusting or agglomeration—a detail often underestimated in production lines prioritizing volume over finesse.

    Model and Specifications: What Our Output Looks Like

    Practically, Phenazopyridine Hydrochloride leaves our warehouse as a bright orange to reddish crystalline powder. Chemists who have worked with this material will instantly recognize its appearance—it stands in contrast to less refined versions which can carry brown or yellow overtones from residual impurities or handling issues. Each production run passes strict tests for identity through IR and UV-Vis spectra, and our finished lots feature low residual solvent content. Microbiological safety forms another pillar in our QC regimen. While Phenazopyridine Hydrochloride isn’t prone to microbial growth due to its nature and handling, regular checks stop any environmental contamination from finding its way into the larger supply chain.

    Particle characteristics influence how the product behaves on the next step, whether that’s granulation, direct compression, or suspension formulation. Our experience shows that an average particle size within a certain tightly-controlled range improves dispersibility and homogeneity in downstream use. Overly fine material can invite static, caking, and even loss during transfer. Oversized grains, on the other hand, may resist blending and delay dissolution. We learned to refine our approach over the years, investing in equipment upgrades and operator training. Our plant’s scale, coupled with real-time feedback, allows us to adjust sieve meshes and mill speeds, reducing rejected batches and supporting client deadlines.

    In reality, regulatory filings and stability data depend on the repeatability of not only chemical assays, but also of mechanical handling. Trials using material sourced elsewhere have underscored this. Lower-quality batches can compromise both rapidity and uniformity of drug release—forcing formulation scientists to either adjust excipient ratios or, in the worst cases, halt development. This brings value to our manufacturing efforts. Maintaining homogeneity from the top of the batch to the last drum means less variation for tablet and capsule producers, and fewer headaches for those designing combination products.

    Usage: Lessons from Production and Market Feedback

    The primary use for Phenazopyridine Hydrochloride remains as a local analgesic in cases of urinary discomfort. Its role as a symptom reliever—rather than as a curative agent—is well understood within both medical and manufacturing circles. Our technical teams regularly interact with downstream formulators. These conversations focus on attributes such as flow properties, compressibility, and compatibility with standard excipients. Years of feedback have led to process modifications. For example, a decade ago, pill manufacturers noted color migration issues during tablet compression. By closely tracking residual moieties and optimizing crystallization temperature, our factory was able to sharply reduce this side effect, minimizing the need for downstream workarounds.

    Another common application question surrounds solubility. Phenazopyridine Hydrochloride dissolves in water, yielding an orange-red solution. This remains true batch over batch when strict control prevents trace contaminants, especially metallic species, from interfering. On a larger scale, solubility impacts uniformity in liquid suspension formulations such as pediatric syrups or solutions intended for populations with swallowing difficulties. Variability in solubility from one drum to another can disrupt entire filling lines, as microcrystallization leads to sedimentation or rejected batches. By focusing on particle integrity and prompt packaging, our plant keeps this metric tightly controlled, limiting lot-to-lot concerns downstream.

    No two customers use Phenazopyridine Hydrochloride in precisely the same formulation environment. Some blend directly into tablets, others require pre-dissolution or specialized encapsulation. Our manufacturing experience has shown that process tweaks—sometimes as simple as additional drying or tailored screening—can make the difference between a successful drug development outcome and extended delays. The unique color intensity of Phenazopyridine Hydrochloride, while valuable as an indicator in clinical use, sometimes raises issues in packaging lines due to the potential for visual cross-contamination. We work collaboratively with end users, adjusting granulation or offering tighter packaging standards on request.

    Occasionally, the market sees claims from alternative sources with seemingly competitive pricing or batch sizes. Decision-makers weighing these options receive regular feedback from our technical sales teams, who collect customer experiences with out-of-spec material. Issues such as excessive residual solvent, variable particle sizes, or off-color product create operational bottlenecks for pharmaceutical companies. Our plant’s willingness to invest in corrective action, rather than only responding reactively, has cemented decades-long relationships. Reliable supply, the ability to provide documentation, and technical support form the backbone of this ongoing collaboration.

    Comparing Ours to Others: Practical Differences and End Results

    Many sources for Phenazopyridine Hydrochloride exist in the global market, but real-world experience separates those who manufacture and those who simply source material. The most obvious point of difference lies in the sharpness of the product’s color and the depth of its crystalline structure. In our plant, operators routinely scan for uniform crystal habit—too many small fragments suggest problems with solvent evaporation or agitation, a point sometimes glossed over in outfits focused purely on yield. Attention to the kinetics of each crystallization run delivers a product that blends easily with standard excipients and does not clump in storage.

    Certainty around identity and purity seems a given, but experience tells a different story. Preventing the formation of related compounds—those listed as impurities in regulatory submissions—can only occur through relentless supervision and adjustment. Our experience over the years shows that under-controlled processes elsewhere often lead to batches failing at these critical checkpoints. For pharmaceutical clients, every deviation can halt regulatory approval or trigger costly investigations. We track deviations, share root cause analyses, and continuously invest in our cleaning validation program to prevent cross-contamination with other compounds.

    Raw material handling also sits at the center of quality distinctions. Vendors shipping in bulk, with minimal environmental controls, introduce risks that only surface during later quality checks. Our production lines isolate process areas, limiting the chance for allergen or dust cross-over and using filtered air to suppress environmental particulate. The packaging process involves immediate transfer to lined, inert drums with molecular sieves, locking in stability gains and guarding against moisture ingress—remaining essential for those with longer shipping routes or variable storage conditions.

    End users who switch from lower-quality sources to our material routinely see reductions in process headaches—less rework, fewer physical anomalies during tableting, and increased assurance in release testing. This isn’t only an internal claim. Over the years, multiple pharmaceutical partners have published studies highlighting process efficiencies and yield increases tied to a change in raw material supplier. Our technical team’s ability to provide documented, traceable batch histories makes it possible for regulatory filings to progress smoothly, giving companies downstream an edge in both time-to-market and compliance reviews.

    Continuous Improvement Based on User Needs

    Our manufacturing philosophies stem not only from current regulatory climate but from a commitment to technical improvement driven by customer feedback. Over the past decade, client audits and on-site reviews have nudged our plant to redesign several key nodes—filter dryer selection, solvent recovery setup, and automated blending. We are never content to rely solely on established certificates of analysis, instead striving to map out further correlations between process control settings and critical quality attributes.

    Members of our senior production and QC teams rotate through targeted training sessions to stay current with both evolving pharmacopoeial standards and the technical science attached to Phenazopyridine Hydrochloride’s properties. When outside observers point out unusual trends—such as a drift in water content or findings of microcontamination—we analyze root causes down to the lot level and, if needed, implement corrective measures that cover multiple upstream steps. This approach contributes significantly to the reliability customers describe after scaling up their purchases.

    Batch data, compiled year over year, provides a window into process improvement. Our plant shifted from legacy manual handling towards semi-automated continuous feeding and optimized solvent recovery several cycles ago, producing a step change in impurity profiles. Investments in particle characterization equipment allowed us to define target ranges, not just on the basis of specification sheets but grounded in real use cases from end users. Technical exchanges with formulation scientists led to improved packaging protocols and recommendations for storage and transfer, which we shared openly, lifting outcomes for those relying on our material.

    Sourcing decisions made by our partners often rest as much on technical support as on chemical quality. A steady stream of documentation support—ISO certificates, DMFs, real-time stability data—puts pressure on us to maintain transparency and readiness to engage in dialogue with regulatory reviewers. The reality of today’s landscape makes this level of support a requirement, not an add-on. Our familiarity with changing Chinese, European, and US standards means audit teams see procedures that are not only robust but have evolved with legislative and technical demands.

    Addressing Issues Raised by Industry Trends

    Market fluctuations, from raw material cost spikes to sudden shifts in demand, ripple through our operations. Recently, global supply chains have faced both logistical disruptions and scrutiny concerning ingredient traceability. Suppliers have sometimes struggled to provide clear answers on batch origins, especially when material passes through several hands before reaching formulation plants. We responded by investing in upstream integration, tracing each precursor batch to its source and insuring full traceability begins before the first reaction vessel is charged.

    External events—such as changing pharmacopoeial monograph requirements—challenge factories to stay nimble. We’ve focused on adapting both documentation and process adjustments rapidly, rather than waiting for external audits. As laboratory methods improve sensitivity, acceptance limits on impurities tighten; we mirror these innovations with improved in-line controls, reducing compliance risk for both ourselves and downstream users. Supporting customers through regulatory changes, particularly when they re-register drugs or need new stability data, forms a core part of our technical engagement.

    Environmental pressure to minimize waste and solvent emissions prompted a shift to closed-loop recovery. Our plant now recovers solvent streams through distillation and filtration, both cutting emissions and lowering input costs, while meeting strict environmental reporting standards. Upgrades such as energy monitoring systems and process water recycling show up in both our operating numbers and third-party audits, providing assurance that sustainable practice never becomes an afterthought.

    How User Feedback Shapes Tomorrow’s Product

    Long-term partnerships with formulators and producers across regions gave us insight into practical, on-the-ground needs rather than academic requirements alone. After recurring requests for finer control over dusting and reduced agglomeration, we incorporated new screening protocols—delivering every drum with documented lot-by-lot particle data. Issues surfacing with high-speed tablet presses, such as capping or unexpected sticking, prompted us to reexamine flow additive compatibility and processing conditions at the pre-blending stage.

    In recent years, a handful of users have moved toward highly potent, low-dosage formulations, asking for even greater consistency from batch to batch. Our technical team responded with a tighter focus on residual analysis and new packaging technologies. This allows manufacturers to scale reliably without reformulating at every campaign. The cooperative loop we established—sharing experiences, receiving direct feedback, and integrating improvements—forms the bedrock of our ability to generate a product that evolves alongside its users.

    Formulators choosing raw material partners weigh not only price and regulatory standing, but the totality of their own manufacturing experience. For Phenazopyridine Hydrochloride, this calculation means years of trouble-free operation, technical outreach, and preventative support outweigh short-term cost savings. We measure our progress by client outcomes, not just certificate numbers, and our history shows a willingness to listen, refine, and commit to lasting improvement.

    Conclusion: Building for the Future

    Years spent refining Phenazopyridine Hydrochloride production brought home the lesson that small details accrue into real-world success. Our focus will always remain on solid technical reliability, openness to user needs, and the ability to adapt with each turn of the global market. For those who rely on material that delivers day in and day out, our team stands committed to the highest practical standards—learning from each campaign, adjusting to each new challenge, and working together for results that speak through years of successful manufacturing partnerships.