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Diethylenetriaminepentaacetic Dianhydride

    • Product Name Diethylenetriaminepentaacetic Dianhydride
    • Alias DTPA dianhydride
    • Einecs 225-305-4
    • 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

    691903

    Chemical Name Diethylenetriaminepentaacetic Dianhydride
    Synonyms DTPA Dianhydride; DTPA-DA
    Cas Number 19794-93-5
    Molecular Formula C14H18N3O7
    Molecular Weight 339.31 g/mol
    Appearance White to off-white powder
    Melting Point 222-226 °C
    Solubility Reacts with water; soluble in aprotic organic solvents
    Purity Typically ≥98%
    Storage Conditions Store at 2-8°C, dry, protected from moisture
    Stability Stable under recommended storage conditions
    Boiling Point Decomposes before boiling
    Reactivity Reacts readily with amines and alcohols
    Hazard Symbol Irritant

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

    Packing & Storage
    Packing 500g of Diethylenetriaminepentaacetic Dianhydride supplied in a tightly sealed amber glass bottle with hazard labeling and desiccant.
    Shipping Diethylenetriaminepentaacetic dianhydride should be shipped in tightly sealed containers, protected from moisture, and stored in a cool, dry environment. It is typically classified as non-hazardous, but proper labeling and handling are required. Shipping must comply with local regulations, using appropriate packaging to prevent contamination or exposure during transit.
    Storage Diethylenetriaminepentaacetic dianhydride should be stored in a tightly sealed container, under an inert atmosphere such as nitrogen, in a cool, dry, and well-ventilated area. Protect from moisture, heat, and direct sunlight. Store away from incompatible substances like strong oxidizers and acids. Proper PPE (personal protective equipment) is essential when handling this hygroscopic and potentially irritating chemical.
    Application of Diethylenetriaminepentaacetic Dianhydride

    Applications of Diethylenetriaminepentaacetic Dianhydride in Industrial Manufacturing

    As a direct manufacturer, we supply diethylenetriaminepentaacetic dianhydride for diverse sectors that rely on advanced chelation, resin synthesis, and specialty chemical processes. Below, we outline key industrial applications and detail implementation in each sector, based on established processing practice and regulatory frameworks.

    1. Chelating Agent Synthesis for Water Treatment Chemicals

    Industrial water treatment suppliers use diethylenetriaminepentaacetic dianhydride as a core intermediate to produce high-purity chelating agents. These chelators, especially DTPA acid and salts, improve scale inhibition and enhance heavy metal removal in municipal, cooling tower, and process water systems. Production lines integrate this raw material during multi-step condensation, neutralization, and downstream purification, guided by batch-specific QC requirements for residual anhydride content and pH profile to ensure finished chelator product stability and regulatory acceptance.

    Industry compliance standards

    • ANSI/AWWA B504-18 (Chelating Agents for Water Treatment)
    • 40 CFR 141 (US EPA National Primary Drinking Water Regulations)
    • EN 15040 (European Chemical Treatment Agents for Water)
    • ISO 9001:2015 (Quality Management System Requirements for Chemical Manufacturing)

    Typical usage ratio

    • 10–35% by weight in the chelator synthesis batch, adjusted according to target chelator purity and desired metal ion exchange capacity.

    Downstream process integration

    • Charged to reactor after initial solvent charge and pH adjustment; dissolved under controlled cooling to minimize hydrolysis; followed by solvent removal and neutralization to form DTPA salt products.

    Final product types

    • DTPA acid (liquid/solid for industrial water treatment)
    • DTPA pentasodium salt
    • DTPA pentapotassium salt
    • Blended chelating agents for boiler or cooling water formulations

    2. Ion Exchange Resin Manufacturing

    Producers of high-performance ion exchange resins employ diethylenetriaminepentaacetic dianhydride as a key chelating ligand during functionalization of polymer beads. The anhydride reacts with amine-functional polystyrene or polyacrylate matrices, delivering enhanced metal binding properties required for high-selectivity applications in hydrometallurgy, pharmaceutical ingredient purification, and nuclear waste remediation. Strict process parameter control ensures complete ring-opening and minimizes residual unreacted material for end-use safety and compliance.

    Industry compliance standards

    • FDA 21 CFR 173.25 (Ion Exchange Resins for Food-Contact Applications)
    • USP 43/NF 38 (Test procedures for pharmaceutical purification)
    • DIN EN ISO 9001:2015
    • RoHS 2011/65/EU (Hazardous Substance Restrictions for Finished Resins)

    Typical usage ratio

    • 3–12% by weight of the dry resin batch, varied according to targeted capacity and bead functionalization density.

    Downstream process integration

    • Introduced after polymer bead sulfonation or chloromethylation step; ring-opening performed in aqueous or organic medium; post-functionalization, beads undergo washing and sieving; final QC confirms absence of residual free amines and appropriate exchange capacity.

    Final product types

    • DTPA-type chelating ion exchange resins
    • Pharmaceutical-grade purification resins
    • Heavy metal scavenger beads
    • High-selectivity nuclear waste capture resins

    3. Contrast Agent Intermediate for Medical Imaging

    In contrast agent manufacturing for MRI procedures, diethylenetriaminepentaacetic dianhydride acts as an essential intermediate during the synthesis of gadolinium-based contrast agents (GBCAs). The material’s chelation properties confer stability to the final gadolinium complexes, minimizing free metal ion release and ensuring patient safety. The process requires precise stoichiometry, strictly documented handling, and rigorous post-synthesis purification steps to comply with global pharmacopoeial standards.

    Industry compliance standards

    • EP (European Pharmacopoeia) Monograph 01/2019:1717 (Gadopentetate Dimeglumine)
    • USP 43–NF 38 (Gadopentetate Dimeglumine Injection)
    • ICH Q7 (GMP for Active Pharmaceutical Ingredients)
    • ISO 13485:2016 (Medical Device Quality Management)

    Typical usage ratio

    • Varies from 8–22% relative to total reaction mass, precisely calculated to achieve complete complexation with lanthanide ions and minimize free gadolinium.

    Downstream process integration

    • Synthesized under cleanroom conditions; dissolved in purified water, neutralized with alkali, then complexed with a stoichiometric amount of gadolinium chloride; subsequent filtration and sterile formulation steps; each batch validated by trace metal and free acid testing.

    Final product types

    • Gadopentetate dimeglumine (MRI contrast agent)
    • Gadoterate meglumine
    • Gadodiamide reagents
    • Other paramagnetic clinical GBCAs for injection

    4. Photographic and Industrial Imaging Chemicals

    Manufacturers of specialized photographic development solutions and industrial imaging reagents utilize diethylenetriaminepentaacetic dianhydride during synthesis of advanced chelating agents. These agents facilitate sharp image development, improved bath stability, and lowered background interference by binding trace metals. The process entails direct reaction with base, precise pH control, and minimal residual contaminant levels to satisfy imaging chemical purity requirements.

    Industry compliance standards

    • ISO 18902:2013 (Imaging Materials – Processed Films – Storage Standards)
    • ANSI/NAPM IT9.2 (Photographic Processing Chemicals)
    • REACH Regulation (EC) No.1907/2006 for chemical safety management
    • ISO 9001:2015

    Typical usage ratio

    • 6–18% by weight in imaging chemical formulation, based on specific developer, bleach, or fixer recipe and targeted metal ion remediation requirements.

    Downstream process integration

    • Dissolved in water or suitable solvent at controlled temperature; mixed with alkali and ancillary chemicals to achieve chelation; introduced during late-stage formulation to preserve agent integrity; blended and filtered to meet high-purity imaging chemical standards.

    Final product types

    • Photographic developer chelating additives
    • Fixer solutions for film or radiological plates
    • Bleach and clearing solutions for x-ray film processing
    • Industrial non-destructive testing (NDT) imaging chemicals

    5. Pulp Bleaching and Paper Processing

    Within the pulp and paper industry, producers incorporate diethylenetriaminepentaacetic dianhydride to synthesize specialized chelating agents for elemental chlorine-free (ECF) and total chlorine-free (TCF) pulp bleaching processes. Such additives reduce scaling, stabilize hydrogen peroxide, and enable lower levels of transition metals during oxidative bleaching, thereby enhancing pulp brightness and minimizing cellulose fiber degradation. Factories maintain controlled dosing strategies and continuous monitoring to ensure consistent batch results and compliance with international paper safety standards.

    Industry compliance standards

    • TAPPI T494 (Quality Control in Pulp Bleaching)
    • ISO 9001:2015 (Plant Quality Management System)
    • REACH Annex XVII (Chemical Restrictions in Paper Manufacturing)
    • FDA 21 CFR 176.170 (Paper and Paperboard for Food Contact)

    Typical usage ratio

    • 3–9 kg per ton of dry pulp, optimized according to incoming metal content and target bleaching intensity.

    Downstream process integration

    • Converted to the active chelating acid or salt via reactor mixing with water and base; dosed to pulp slurry ahead of the hydrogen peroxide or oxygen delignification stage; dosing system adjusts for pulp pH and flow rate to maximize bleaching efficiency.

    Final product types

    • Bleached kraft pulp
    • High-brightness specialty paper
    • Uncoated and coated printing paper grades
    • Paperboard for food and beverage packaging
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    Certification & Compliance
    More Introduction

    Diethylenetriaminepentaacetic Dianhydride: Expertise and Experience Shape a Reliable Solution

    Understanding the Role of Diethylenetriaminepentaacetic Dianhydride in Modern Chemistry

    Few chemicals drive innovation as consistently as Diethylenetriaminepentaacetic Dianhydride. This multifunctional compound—often abbreviated as DTPA dianhydride—functions as a core building block in chelation chemistry, advanced polymer synthesis, and specialty applications that demand high-purity agents. The industry pushes for tighter purity controls, longer shelf lives, and consistent particle size distribution, factors that cannot be overlooked. As the original manufacturer, we have spent years refining not just the synthesis, but also every step that follows—handling, packaging, shipping—for minimized impurity footprints and optimal performance.

    Our history with DTPA dianhydride goes back decades. We have watched demand shift from simple laboratory needs to high-performance applications in the fields of water treatment, medical imaging, and advanced agriculture, all requiring detailed know-how in purification, lot consistency, and scalable logistics. Chemists now drive harder requirements for trace metal content or specific reactivity profiles. DTPA dianhydride, distinctively, bridges that gap through its strong chelating structure—transforming metal ions into stable, useful compounds and intermediates.

    Manufacturing Perspective: Consistency and Integrity Make the Difference

    Any experienced chemist recognizes DTPA dianhydride by its off-white, moisture-hungry flakes or powder. Moisture control sits near the very top of any production environment. Exposed to dampness, the product degrades or partially hydrolyzes, leading to unpredictable performance in demanding syntheses. Our process addresses atmospheric control at every stage, cutting down the risk of hydrolysis through careful drying, sealed packaging, and fast throughput from synthesis reactor to warehouse. Years of experience show that skipping these steps leads to inconsistent downstream yields, which customers notice immediately in critical reactions.

    Trace impurities—iron, calcium, sodium—compete with chelation performance. It takes more than off-the-shelf purification tools; hands-on adjustment of wash ratios, choice of filtration media, and purification protocols set benchmark purity standards. Our internal QA has flagged and resolved recurrent process bottlenecks longer than many traders have worked in the industry, giving us unique insight into process adjustment and supply security. This minimizes batch variation and strengthens supply chain resilience, especially as raw material prices fluctuate or logistic channels face seasonal disruption.

    Dust management presents another often-overlooked challenge for manufacturers of DTPA dianhydride. Fine, free-flowing powder can gum up transfer lines and cause operator discomfort. Production-scale handling equipment, well-designed vacuum transfer, and routine environmental monitoring create a cleaner, safer work area—all translating to better batch yield and less product loss. These investments cost time and resources upfront, but over the years they have paid back in fewer customer complaints, higher purity, and lasting customer relationships.

    Applications Shaped by Real-World Needs and Experience

    DTPA dianhydride’s main draw comes from its strong chelating properties. Scientists turn to it for binding even the most stubborn metal ions—iron(III), copper(II), and rare earths. In water treatment, it plays a role in controlling metal concentrations, allowing for precise removal or conditioning. As a manufacturer, we see questions shift over time: thirty years ago, most inquiries sought simple technical guidance or modest lot sizes. Today, more buyers insist on evidence for batch-to-batch consistency, technical support for regulatory audits, even zero-contact packaging to meet strict hazard containment policies.

    Interest from the medical field has been especially transformative. DTPA derivatives figure in MRI contrast agents and radioisotope control, where impurities and moisture content can invalidate months of research or irreversibly compromise a clinical batch. Working with pharmaceutical manufacturers forced us to invest in new analytical techniques—ICP-MS for metals, sophisticated moisture analysis, even residual solvent profiling. Regulatory requirements compelled a granular traceability system that follows every batch from raw material through finished-goods shipment, which now benefits all market segments.

    Agriculture and micro-nutrient delivery mark another growing sector. Chelated micronutrients derived from DTPA dianhydride drive efficient crop uptake of iron, zinc, and manganese—a key need in modern high-intensity farming. Feedback loops with end-users—fertilizer blenders, scientific researchers, growers—prompted formulation tweaks and incentive programs for return-container logistics, which in turn fostered better transparency and environmental responsibility.

    For specialty polymers, DTPA dianhydride acts as a crosslinking or functionalizing intermediate, delivering selectivity and reactivity unachievable with lower chelates. Product developers push for precise stoichiometry, targeted molecular weights, and minimal catalytically-active contaminants. This translates into even stricter quality standards, as a few ppm of transition metals can disable a catalyst or poison a production run. Our years on the production floor, working side by side with R&D teams, have led to in-depth comprehension of these high-value applications—and, more importantly, how to avoid the pitfalls that undermine a project.

    Product Differences: Direct Experience Draws the Sharpest Contrast

    Not all DTPA dianhydride is the same. Chemically, it shares the core structure and theoretical purity as other sources, but real-world results tell a different story. We focus on critical differences that users report to us year in and year out. Sourcing from direct manufacturers replaces guesswork with documented traceability, actual batch data, and application-specific support.

    Some competitors cut costs through bulk, uncontrolled drying or extended storage, which introduces the risk of hydrolysis and hidden impurity pickup. A batch with borderline levels of water or metal contaminants will behave unpredictably during chelation, often leading to scale formation, failed reactions, or skewed analytical results. Our approach, honed by decades supplying pharmaceutical, research, and industrial clients, involves nearly obsessive documentation of each drying cycle, humidity profile, and batch aging period, ensuring the product retains peak reactivity from warehouse to laboratory bench.

    Many clients bring us samples from alternative suppliers, seeking explanations for variable pH, strange off-odors, or rapid degradation in working solutions. Our internal studies trace these symptoms back to off-spec storage, leaky packaging, or simply lack of knowledge in live production environments. These real-world lessons repeat themselves every year: careful control wins out over shortcuts, and technical support by trained chemistry professionals leads to more reliable application results. That institutional memory holds more value than the least expensive per-kilo deal on the market, especially once lost research time and repeated synthesis failures are considered.

    Some alternative products show batch streaks of discoloration or variable melting points. Our process engineers catch these through careful blend controls and thermal processing, rejecting subpar lots before they reach the loading dock. Everyone benefits: warehouse staff spend less time troubleshooting rejected batches, laboratory users enjoy more reproducible results, and technical service teams have fewer complaints to address. Years of direct customer feedback have informed these protocols, providing hard data rather than marketing copy.

    Clients in regulated spaces consistently highlight our full spectrum documentation, which stands up to full forensic level audit. Every analytical run and calibration gets archived, empowering technical staff to answer regulators with confidence. This kind of compliance handling emerges only from years of working alongside high-stakes industries—drug development, electronics manufacturing, environmental control—where process integrity makes or breaks a new product launch or regulatory inspection.

    Specifications Reflect Granular Expertise

    Industry standards call for DTPA dianhydride to feature high purity, controlled moisture, and reliable flow for both scale-up and laboratory use. Our commonly supplied model, with purity exceeding 99% by titration and low residual metal content, meets those demands. The melting range, not just a theoretical value but a marker for product health and storage quality, gets checked semiweekly to ensure consistency. We hold the product in moisture-barrier drums and foil-lined interiors, a step that many bulk suppliers overlook as unnecessary, but one that preserves shelf life and working quality in humid environments.

    Some customers specify further, asking for lot-specific guidance on solubility in organic solvents or water, compatibility in specific process flows, even custom sieving or blending for pilot-scale runs. Our technical team, with hands-on process experience, reviews these requests, balancing the constraints of laboratory optimization with production-scale tradeoffs. Technical support from people who have run the reactors, not just sold the product, closes the loop between production and innovation.

    Shelf life and handling guidelines matter as much as purity. DTPA dianhydride maintains stability for at least two years under sealed, dry storage, but factors like repackaging, local warehouse conditions, or repeated opening can shorten that interval. We recommend single-use packaging for the most sensitive uses, and we have worked with clients to design secondary containment systems or batch-sized units that integrate directly into closed-system reactor feeds. These practical equipment modifications grew out of long-term partnerships with engineers and plant operators, evolving past trial and error into efficient standard practice.

    Addressing Industry Challenges: The Value of Practiced Solutions

    Concrete experience with DTPA dianhydride points to broader industry lessons. Logistics headaches, sudden regulatory shifts, spikes in raw material costs—all have direct impact on end user satisfaction. We have weathered customs seizures, droughts affecting supply of amine feedstocks, and hurricanes slowing ocean freight. Contingency planning, supported by process redundancy and local warehousing, helps us keep product movement uninterrupted. These provisions emerged only by learning from real-world disruption, not abstract process mapping.

    Pricing volatility demonstrates another industry challenge. Some newer entrants cut corners during surge demand, offloading aged or off-spec batches into the supply chain. End users bear the brunt in the form of atypical product behavior, unscheduled downtime, and eventually failed final products. Our response: lock in upstream agreements with primary suppliers and implement multi-year raw material hedging. This keeps both costs and performance within predictable bounds, despite global turbulence.

    Environmental responsibility plays out differently since DTPA dianhydride production involves energy-intensive steps and requires vigilant containment of dry powder as well as finished goods. Years invested in process filtration and recycling enable waste minimization. Our on-site remediation protocols allow for solvent recycling, zero-discharge wastewater, and improved scrubber efficiency, measures that exceed local compliance mandates. The incentive comes not just through regulatory compliance, but also through persistent customer feedback and the knowledge that end-users now demand cradle-to-grave accountability.

    Worker safety cannot slip. Direct handling of the fine anhydride powder irritates eyes and mucous membranes, and inhalation presents unnecessary risk. We designed operator training programs based on observed incident patterns, upgraded to HEPA-filtered transfer lines, and established routine medical screening. Years of direct feedback from shop floor staff prevented injuries, reduced absence rates, and reinforced the value of genuine experience over abstract policy.

    Building Long-Term Value: Transparency, Technical Support, and Predictable Quality

    Supplying DTPA dianhydride requires more than just a chemical and a certificate. Long-term relationships underpin predictable performance and customer satisfaction. Project after project, clients share how steady, documented supply saves weeks of laboratory troubleshooting—the difference between published research and failed grant cycles. We document every aspect of our process, inviting both returning and new clients to audit our methods, examine our records, and validate our lab protocols. Openness, not polished advertisement, forms the basis of trust in this segment.

    Technical support extends beyond data sheets. Customers describe specific application hurdles—stubborn metal complexation, random yield drops, unexplained product degradation. Real solutions come from practitioners who have run the synthesis, solved product instability in scale-up, or handled similar cases. In our experience, most issues arise from breaks in the handling chain—condensation in shipping, improper storage by local warehouses, or misunderstanding of shelf life guidelines. We close these gaps by training distributors, offering remote and on-site support, and, when necessary, producing custom documentation or user guides based on the exact scenario described.

    Sample requests frequently entail more than a few grams in a bottle. Regulatory groups, QA auditors, or university researchers request detailed process validation, chain of custody, and even third-party analytical certificates. Our technical team steps in, providing original source documents, certifying operator signatures, and archiving photos of every stage of packaging. We stand behind this accountability, since it translates to fewer rejected lots, faster onboarding for new users, and a reputation for reliability that direct users and contract processors appreciate.

    As DTPA dianhydride integrates further into life science, high-tech manufacturing, and cutting-edge materials research, we plan investments in new process equipment, expanded warehousing, and expanded technical training. These steps arise from direct dialogue with advanced users—feedback that shapes everything from shift-scheduling to long-term product development. We take pride in evolving alongside customer needs, relying on our practical knowledge to drive continuous improvement and sustain a strong reputation in a competitive marketplace.

    For buyers, project managers, and researchers who demand evidence-based confidence in their chemical building blocks, direct manufacturer supply of DTPA dianhydride stands as a solution honed by years of practical application, technical discourse, and transparent partnership. Our story unfolds with every batch, every solved technical query, and every satisfied client, feeding a tradition of reliability that is earned, not assumed.