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Phenolphthalein Diphosphate Tetrasodium Salt

    • Product Name Phenolphthalein Diphosphate Tetrasodium Salt
    • Alias PDP
    • Einecs 246-360-6
    • 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
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    Specifications

    HS Code

    993909

    Product Name Phenolphthalein Diphosphate Tetrasodium Salt
    Chemical Formula C20H16Na4O10P2
    Molecular Weight 592.23 g/mol
    Cas Number 18466-51-8
    Appearance White to off-white powder
    Solubility Soluble in water
    Storage Conditions Store at 2-8°C, protected from light
    Purity Typically >95%
    Application Chromogenic substrate for phosphatase assays
    Ph Indicator Range 8.2 to 10.0
    Synonyms Phenolphthalein diphosphate, tetrasodium salt
    Sensitivity Sensitive to light and moisture

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

    Packing & Storage
    Packing The chemical comes in a 10g amber glass bottle with a secure screw cap, clearly labeled "Phenolphthalein Diphosphate Tetrasodium Salt."
    Shipping Phenolphthalein Diphosphate Tetrasodium Salt should be shipped in tightly sealed containers, protected from moisture and light. Transport it in accordance with local, national, and international regulations for non-hazardous chemicals. Use secondary packaging to prevent leaks or contamination, and include appropriate labeling and documentation for identification and safe handling during transit.
    Storage Phenolphthalein Diphosphate Tetrasodium Salt should be stored in a tightly closed container, in a cool, dry, and well-ventilated area. Protect it from light, moisture, and incompatible substances such as strong oxidizers. Keep at room temperature (15–25°C). Avoid exposure to air and store away from acids and strong bases. Ensure proper labeling and restrict access to authorized personnel only.
    Application of Phenolphthalein Diphosphate Tetrasodium Salt

    Applications of Phenolphthalein Diphosphate Tetrasodium Salt in Industrial Manufacturing

    Phenolphthalein Diphosphate Tetrasodium Salt serves as a specialized chemical intermediate in several controlled industrial processes. Our manufacturing experience covers strict quality assurance and regulatory compliance to meet the complex needs of high-value downstream sectors. Below are direct application fields detailing quantifiable use, regulatory controls, and technological integration.

    1. Clinical In Vitro Diagnostic Reagents

    Laboratories producing enzyme activity test kits frequently specify Phenolphthalein Diphosphate Tetrasodium Salt as a chromogenic substrate for alkaline phosphatase (ALP) detection. In reagent formulation, this compound undergoes dephosphorylation in the presence of ALP, releasing phenolphthalein for subsequent colorimetric endpoint analysis. Selection of this substrate provides high specificity in clinical serum, urine, and cell assay workflows. Our product supports precise quantitation, minimizes background interference, and offers good lot-to-lot stability throughout automated or manual kit assembly.

    Industry compliance standards

    • ISO 13485:2016 (Medical Devices—Quality Management Systems)
    • Clinical and Laboratory Standards Institute (CLSI) guidelines for in vitro diagnostics
    • European IVDR 2017/746 for diagnostic reagents
    • US FDA 21 CFR 809.30 for general laboratory reagents

    Typical usage ratio

    • 0.1–1.0 mmol/L in prepared buffer systems
    • Adjustment based on targeted detection limit and kinetic assay format

    Downstream process integration

    • Substrate incorporated in premixed reagent vials or lyophilized detection tablets
    • Loaded during final formulation stage before aseptic filling and quality control testing
    • Used in both automated analyzers and manual ELISA workflows
    • Stabilizer and solubilizer selection critical for consistent shelf life

    Final product types

    • Serum ALP detection kits
    • Point-of-care urinalysis strip tests
    • Clinical microplate-based enzyme assay kits
    • Cell-based laboratory detection reagents

    2. Food Allergen Residue Test Kits

    Food safety laboratories apply Phenolphthalein Diphosphate Tetrasodium Salt within enzymatic allergen detection assays, especially for verifying cleaning validation and cross-contamination in food manufacturing lines. ALP-tagged antibody complexes use this compound as a substrate to detect trace proteins from allergens like milk, egg, or soy. The substrate's selective response under controlled pH enables clear endpoint interpretation, supporting rapid risk assessment and HACCP programs in commercial kitchens and industrial facilities.

    Industry compliance standards

    • ISO 22000:2018 (Food Safety Management Systems)
    • AOAC Official Methods for ELISA allergen testing
    • US FDA BAM (Bacteriological Analytical Manual) allergen section
    • EU Commission Regulation (EC) No 2073/2005 on food safety testing standards

    Typical usage ratio

    • 0.25–1.5 mmol/L depending on assay sensitivity and matrix complexity
    • Optimization based on required detection threshold (e.g., 1–5 ppm)

    Downstream process integration

    • Prepared for use with immobilized antibody microplate or dipstick devices
    • Integrated at final assay kit assembly, often freeze-dried for distribution
    • Quality control includes cross-reactivity and blank control testing
    • Batch release after verification of substrate purity and background signal

    Final product types

    • ELISA kits for milk, egg, peanut, tree nut, and soy allergen detection
    • Surface swab testing kits for food processing equipment
    • Rapid combination test strips for on-site hygiene validation
    • Laboratory reference standards for external quality assurance programs

    3. Pharmaceutical Quality Control Laboratories

    Research and commercial pharmaceutical laboratories utilize Phenolphthalein Diphosphate Tetrasodium Salt during the evaluation of phosphatase enzyme inhibitors in new chemical entity screening. The compound offers stable performance in complex matrix interference studies and baseline reproducibility for regulatory documentation. Analysts integrate this substrate in fluorometric and colorimetric enzyme inhibition assays, supporting both development and batch release of drug substances or finished products.

    Industry compliance standards

    • Good Laboratory Practice (GLP), OECD Principles
    • US FDA 21 CFR Part 58 (GLP for Nonclinical Laboratory Studies)
    • European Pharmacopoeia (Ph. Eur.) for analytical reagent use
    • ICH Q2(R1) Validation of Analytical Procedures: Methodology

    Typical usage ratio

    • 0.2–5.0 mmol/L in enzyme inhibition assay buffer
    • Ratio adjusted to match inhibitor IC50 determination range

    Downstream process integration

    • Dissolved in assay preparation prior to inhibitor incubation phase
    • Batch-prepared for multi-well plate screening or cuvette-based reference tests
    • Used alongside control substrate lots for inter-laboratory comparison
    • Assay includes direct colorimetric measurement following defined substrate turnover time

    Final product types

    • Pharmacological enzyme inhibition assay panels
    • Batch release QC kits for active pharmaceutical ingredient (API) manufacturers
    • Research-grade inhibitor screening kits
    • Validation system reagents for lab QA/QC

    4. Water Quality Enzyme Activity Monitoring Systems

    Environmental monitoring agencies and water utility laboratories choose this compound as an enzymatic indicator for in-field and laboratory analysis of alkaline phosphatase activity in water samples. This parameter provides insight into eutrophication and nutrient cycling in freshwater bodies. Implementation uses prepared, buffered reagents and standardized test strips for single-use analysis or benchtop colorimetric cuvettes for multi-sample workflows. Our product’s purity specification and packaging support known reference interval establishment and operator safety.

    Industry compliance standards

    • ISO 5667-16:2017 (Sampling of water—Laboratory sample preparation)
    • US EPA Methods 365.1 and 365.4 for phosphate and enzyme activity in natural waters
    • DIN EN ISO 6878:2004 for determination of phosphorus using enzyme reactions
    • OECD Guidelines for the Testing of Chemicals—Aquatic Toxicology

    Typical usage ratio

    • 0.05–0.5 mmol/L buffered reagent concentration
    • Optimization according to water sample turbidity and matrix effects

    Downstream process integration

    • Incorporated into single-use reagent sachets for portable field kits
    • Stabilizer addition post-dissolution for extended shelf stability
    • Used in standardized reaction vessels for colorimetric intensity comparison
    • Quality assurance through low-blank and spike-recovery controls

    Final product types

    • Field test kits for surface water phosphatase activity
    • Bench reagent systems for eco-laboratories
    • Automated colorimetric analyzers for municipal water plants
    • OEM-branded consumables for environmental contract labs

    5. Industrial Hygiene Surface Residue Detection Systems

    Process control and cleaning validation teams in pharmaceutical, biotech, and food plant settings use phenolphthalein-based diphosphate substrates in swab-based residue detection kits. These kits measure post-sanitation enzyme activity to verify removal of critical contaminants. The compound’s consistent response in low-extractable matrices and high signal-to-noise characteristics contribute to rapid decision making during routine audits or incident response. Quality requirements demand documented traceability, solution clarity, and proven stability after repetitive site transfer.

    Industry compliance standards

    • GMP guidelines: European EudraLex Volume 4, US FDA 21 CFR Parts 210/211
    • ISO 14698-1:2003 for hygienic monitoring of controlled environments
    • WHO TRS 986 Annex 2 for quality risk management in manufacturing plants
    • USP <1072> Disinfectants and Antiseptics—test reagent validation

    Typical usage ratio

    • 0.1–2.0 mmol/L working solution based on target surface area and residue profile
    • Ratio tuned for detection sensitivity and rapid endpoint development

    Downstream process integration

    • Pre-weighed dry reagents in self-contained test tubes or cassettes
    • Activated at point-of-use by controlled dilution with swab eluate
    • Used in conjunction with color comparator cards for semi-quantitative assessment
    • Batch testing of blank and positive control samples for validation

    Final product types

    • Industrial surface swab residue test kits
    • Cleaning validation monitoring systems
    • Hand-held enzymatic test modules for in-process hygiene checks
    • Standardized reference controls for validation and training
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    Certification & Compliance
    More Introduction

    Phenolphthalein Diphosphate Tetrasodium Salt: Supporting Laboratory Precision Through Consistent Manufacturing

    The Thought Process Behind Making Phenolphthalein Diphosphate Tetrasodium Salt

    In a specialty production environment, Phenolphthalein Diphosphate Tetrasodium Salt comes to life in a very controlled setting. Our chemists work hands-on, paying attention to each batch as materials move through every purification and reaction stage. The final product is only as reliable as the methods used at the bench—hard-won skills learned over years under the hood. Quality here does not start with paperwork or end with batch records; it grows from direct involvement.

    What Sets This Compound Apart in Laboratory Use

    In research and diagnostic work, laboratories rely on products that perform the same way every single time. Phenolphthalein Diphosphate Tetrasodium Salt offers strong signal clarity as a substrate in enzyme assays, especially where alkaline phosphatase needs to be detected. The vivid color change that develops during enzyme activity shows up clearly, allowing for easy observation and accurate measurement. For people at the bench, the difference between measurable and missed activity can boil down to the lots they run or a compound’s stability on the shelf. Our hands-on approach to monitoring pH, moisture content, and particle size during every stage supports those who need their controls and standards to meet the same benchmark year in, year out.

    Why We Put Focus on Batch Consistency

    We have seen how even small shifts in production conditions—humidity in the plant, a slight dip in reaction temperature—may show up later as variability in color response or solubility. Each time a researcher asks us about lot-to-lot differences, our team can stand by both the results and the raw material history. No one running clinical diagnostics wants to see an enzyme assay drift over months or years. Traceability does not mean locking away secrets; it means knowing every source, every shipment, and documenting changes. By using the same grade of starting materials and calibrating our instruments with reference samples before each big run, we meet the expectations of people who measure success in microliters, not grand statements.

    Model and Specification Choices: Practical Impact

    We offer Phenolphthalein Diphosphate Tetrasodium Salt in a handful of carefully tested concentration and purity grades, not to follow trends, but because each application asks for different strengths. In our experience, labs working on automated analyzers prefer a higher purity, granular product, as it flows without clumping and dissolves fast, even at low concentrations. Troubleshooting solubility for end users decades ago had us revisit both the drying method and milling approach. What we ship today comes from years of notes, late-night test runs, and back-and-forth with scientists who pointed out where older materials let them down, be it a slow start in the reaction well or a faint background signal.

    Differences From Other Phosphate Substrates

    Many people ask how our compound compares with nitrophenyl phosphate salts or colorimetric indicators like fluorescein monophosphate. The answer depends on the application, but one clear distinction appears in visual clarity and stability of the colored product. While nitrophenyl phosphate gives a yellow solution with quick readings, some teams need the sharp pink endpoint and higher molar absorptivity. Phenolphthalein Diphosphate Tetrasodium Salt delivers a more dramatic change and can withstand long incubation times without fading, making it a favorite for manual workflow settings or for endpoint readings where a photometer may not catch subtle tones. The tetrasodium salt form, as opposed to the less soluble disodium version, dissolves rapidly and remains stable across a broader pH range, eliminating frustrating repeat runs or filter steps in preparation. Staff in clinical, food, or water analysis have told us that easy handling has kept them on track during high-throughput seasons, with less risk of pipetting errors due to incomplete dispersal or precipitation in buffer solutions.

    Lessons From Working With Pure Enzyme Substrates

    Manufacturing reagents for the life sciences means rolling up your sleeves. We live with raw material delays, unplanned batch failures, and the challenge of scaling up a process from a one-liter flask to a fifty-liter vessel. The reason our Phenolphthalein Diphosphate Tetrasodium Salt stands out is that we learned the limits of each step—the point where over-drying ruins a batch, or a tiny bit of iron contamination adds unwanted color. Years of troubleshooting have built a process that’s robust, not just compliant. We keep surplus stocks of filter aid and alternate glassware because a single impurity in a run can ruin days of effort. Our customers know there’s a direct line between the technical skills in our plant and the data in their reports. If a batch failed stability or left a haze in test solutions, we heard about it and changed the workup.

    Supporting Diverse Customers: Researchers, Diagnostics Labs, and Beyond

    This reagent finds a home in research hospitals, water treatment labs, and commercial enzyme kit manufacturers. Some run hundreds of tests per day under regulatory review, others hunt for rare enzyme activities in biological samples. Our conversations with lab managers have taught us that reliability matters more than any marketing claim—in the long run, a product either lets people work confidently or costs them time in the form of repeats and recalibrations. By building our production calendar to mirror customer demand cycles and maintaining a technical support team with real plant experience, we close the communication gap that plagues many chemical suppliers.

    Safety and Handling, From An Operator’s Perspective

    In the plant, we recognize that safety is grounded in routine. Phenolphthalein Diphosphate Tetrasodium Salt does not pose heavy handling hazards compared to volatile or highly reactive materials, but paying attention to powder dust, glove hygiene, and storage in dry, cool areas helps avoid downstream product variance. We stress open communication between lab and production staff, so storage issues at a customer’s site reach us before a problem compounds. Practical tips—such as sealing jars quickly, avoiding moisture-rich environments, and rotating stock regularly—keep quality consistent and reduce costly waste. Our shipping team invests in tight-sealing packaging and secondary desiccants, relying on real-world feedback from users who run bulk lots or small vials in high-frequency setups.

    Choosing This Substrate for Colorimetric Enzyme Detection

    Colorimetric assays rely on clear interpretation, especially where automated readers or visual scoring prevail. By sticking with well-characterized batches and reproducible preparation, users avoid ambiguous outcomes. End users have reported clearer baselines, fewer false positives, and steadier readings in kinetic studies and endpoint applications. The step up in reliability from generic or loosely specified alternatives becomes obvious in daily use—especially for labs tracking low-level enzyme activity amid complex backgrounds. Where some brands may lose stability in alkaline buffers or shift color under high humidity, the tetrasodium salt retains performance, extending shelf life and easing revalidation burdens.

    What We See in Common Pitfalls, and How the Team Solves Them

    Early on, our technical staff documented subtle product drift during seasonal transitions. This led to changes in our humidity control protocols and improvements in internal packaging. We addressed complaints of batch caking by integrating in-line drying and switching to low-permeability pouches. Open-door discussions with customers gave insight that a reagent’s journey does not end after shipment—storage, light exposure, and buffer compatibility all shape the final results. For customers struggling with incomplete solubility in high-throughput workflows, we reformulated our grind profile, balancing particle size with flow properties to match manual and automated pipetting systems.

    Elevation Through Standards and Certification

    While some projects only need research-grade quality, others demand audit-ready traceability and consistency. For this, our in-house documentation matches the standards used by food safety, medical device, and pharmaceutical labs. Every jar can be traced back through the entire production chain. Auditors have access to calibration and maintenance records, tying all the invisible processes behind the reagent to the final assay result. We have responded to international demands for increased scrutiny with tighter internal checks, relying on both ISO-based quality management and the troubleshooting skills gained from years on the bench. Customers prioritizing compliance see the difference during site visits or technical questionnaires—nothing is improvised or explained after the fact.

    Compatibility and Long-Term Viability

    We pay attention to buffer compatibility, long-term storage stability, and the ability to perform under temperature swings. Not every batch winds up under ideal lab conditions; power failures, shipping mishaps, or unexpected weather can impact storage. By building robust quality margins into the product—an aspect most visible only when things go off-script—our phenolphthalein-based substrate remains viable after unexpected events. End users running extended test runs or multi-week studies have shared success stories where consistent absorbance readings and minimal lot drift helped them finish projects ahead of schedule, with less repeat calibration.

    Continuous Dialogue With the Scientific Community

    Most improvements in the manufacturing and specification of our Phenolphthalein Diphosphate Tetrasodium Salt surface through direct customer feedback. We encourage open lines for questions on use cases, interference, or preparation. Scientists working on adapted methods or custom assay panels share real-world scenarios that rarely make it into published literature. We take these comments seriously, using them as a springboard for process upgrades. For example, a repeated request for bulk lots led to custom packaging, while unique application notes from water testing agencies pushed us to prioritize both particle uniformity and documentary clarity. These ongoing collaborations help us adapt manufacturing not just for scale, but for impact across emerging scientific needs.

    Environmental and Supply Chain Considerations

    Our supply chain management reflects hard lessons learned from market shifts and resource bottlenecks. We secure reliable upstream sources and track transportation closely, aiming for transparency from vendor selection to final delivery. By using recyclable packaging and monitoring energy inputs, we meet both customer demand for sustainability and internal cost control goals. Lab managers increasingly ask for green chemistry considerations—solvent minimization, efficient purification, and energy-saving process steps impact decisions at every stage. As environmental regulations evolve, our compliance team pre-emptively reviews processes so users rest assured their materials support both experimental progress and responsible stewardship.

    Looking to the Future: Scaling for Growth, Maintaining Integrity

    The demand for stable, consistent enzyme substrates continues to rise as testing networks expand and more applications move toward automation. Our challenge lies in meeting larger batch requests without letting go of the hands-on knowledge that underpins reproducibility. Plant operators and formulation chemists share ideas weekly, refining schedules so a spike in demand never means cutting corners. The lessons from small batch production anchor our approach to big orders. Each new reactor, packing line, or documentation platform connects back to the question: Will this batch meet the standards set by decades of customer trust? In practice, that means investing in skilled staff, cross-training, and ongoing maintenance rather than betting on automation alone.

    Building Confidence: Why Direct Manufacturing Matters

    Trust flows more easily between people who have invested time together in troubleshooting and improvement. Staff who synthesize, test, and package every jar of Phenolphthalein Diphosphate Tetrasodium Salt know they impact a chain of results: research breakthroughs, clinical diagnoses, or safe water on tap. Each call we answer, batch we recall, or supply chain pivot we undertake circles back to accountability. By keeping our process transparent and responsive, by learning from both what worked and what fell short, we help users get reliable, unambiguous results. Stories from the field continue to push us toward tighter controls and open dialogue, reminding us that making a trusted reagent never ends in the factory—it lives in every experiment, decision, and published result that depends on true consistency and care.