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HS Code |
226978 |
| Chemicalname | Purified Terephthalic Acid |
| Abbreviation | PTA |
| Molecularformula | C8H6O4 |
| Molarmass | 166.13 g/mol |
| Appearance | White crystalline powder |
| Meltingpoint | 300 °C (decomposes) |
| Odor | Odorless |
| Solubilityinwater | Slightly soluble |
| Density | 1.522 g/cm³ |
| Casnumber | 100-21-0 |
| Ph | 2.0 - 3.5 (in suspension) |
| Flashpoint | > 210 °C |
| Mainuse | Production of PET (polyethylene terephthalate) |
| Purity | Typically ≥ 99.8% |
As an accredited Purified Terephthalic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg net weight, packed in tightly sealed, multi-layer polypropylene bags with an inner polyethylene liner, labeled "Purified Terephthalic Acid." |
| Container Loading (20′ FCL) | Purified Terephthalic Acid is loaded in 20′ FCL, typically in 25kg bags, totaling about 20 metric tons per container. |
| Shipping | Purified Terephthalic Acid is shipped in tightly sealed, moisture-resistant containers such as polyethylene-lined bags, drums, or bulk containers. Transport requires clean, dry conditions to prevent contamination and caking. Proper labeling and compliance with safety guidelines are essential, and routine checks ensure integrity during storage and transit. |
| Storage | Purified Terephthalic Acid should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and sources of ignition. The storage container must be tightly sealed, made of compatible material, and clearly labeled. Avoid contamination with strong oxidizing agents. Maintain the storage area free of moisture to prevent caking, and implement spill control measures to ensure safe handling. |
| Shelf Life | Purified Terephthalic Acid typically has a shelf life of 2 years when stored in a cool, dry, and well-ventilated area. |
Applications of Purified Terephthalic Acid in Industrial ManufacturingAs a producer of purified terephthalic acid (PTA), we supply high-purity raw material essential for a range of well-established downstream industries. Our manufacturing expertise and strict quality management align with the diverse, process-driven requirements of major sector leaders. The following industrial scenarios demonstrate the material’s role according to actual downstream applications, regulatory expectations, and production methodologies. 1. Polyester Fiber ManufacturingPolyester fiber producers use this material as a fundamental component in the synthesis of polyethylene terephthalate (PET), forming the backbone of textile-grade polyester. Integration begins at the esterification and polycondensation reaction stage, where purity and reactivity directly determine fiber strength, dye uptake, and uniformity. The raw material’s input ratio shapes both filament and staple fiber performance for the garment, home textile, and industrial yarn sectors. Fiber producers set dosing rates based on targeted molecular weight, melt viscosity, and spinning conditions, adjusting to the output profile of continuous or batch reactors. Industry compliance standards
Typical usage ratio
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2. PET Resin for Bottling and PackagingPET resin producers rely on our material for its optical purity and minimal contaminant profile, ensuring clarity, strength, and food safety of molded preforms and bottles. The polyesterification process demands consistent batch-to-batch acid values, as deviations can cause defects in stretch blow-molding and compromise migration limits in food contact applications. Resin manufacturers customize PTA input based on catalyst type, glycol composition, and required resin IV to achieve precise bottle wall thickness and barrier properties. Industry compliance standards
Typical usage ratio
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3. PET Film ProductionFilm converters incorporate this material to produce high-clarity, high-strength polyethylene terephthalate films suitable for a range of technical, electrical, and packaging uses. The input purity and consistency directly regulate film surface properties, dielectric strength, and resistance to hydrolysis. Only precise monomer ratios can yield films meeting endpoint dimensional stability demanded by downstream slitting, coating, and lamination units. Producers monitor acid input to optimize both extrusion and sequential or simultaneous biaxial orientation steps. Industry compliance standards
Typical usage ratio
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4. Engineering Plastics ApplicationsManufacturers of polybutylene terephthalate (PBT) and other high-performance thermoplastics use purified terephthalic acid as a primary building block in condensation polymerization with glycols. Accuracy in the acid’s input weight defines the polymer’s degree of crystallinity, heat resistance, and dimensional stability required for automotive, E&E, and appliance components. By controlling the dosing and reactivity at the polymerization stage, companies achieve precise flow, moldability, and finished part tolerances under demanding operating environments. Industry compliance standards
Typical usage ratio
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5. Industrial Coatings and Powder Coating ResinsProducers of saturated polyester resins for industrial coatings incorporate this raw material to define backbone rigidity, chemical resistance, and weatherability of coatings. The usage ratio and introduction point dictate molecular architecture, reactivity with crosslinkers, and final film performance on metallic or plastic substrates. Precision during the melt polycondensation step ensures targeted glass transition, resistance to outdoor exposure, and compatibility for hybrid or pure polyester powder formulations. Industry compliance standards
Typical usage ratio
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6. Liquid Crystal Polymer (LCP) ProductionAdvanced materials manufacturers use ultra-pure PTA as a key dicarboxylic acid in synthesizing aromatic polyesters for liquid crystal polymer applications. Strict regulation of acid input and purity determines the final polymer’s anisotropic melt phase behavior and mechanical performance at high temperatures, especially for microelectronics and precision connectors. The material enters the finely-tuned polycondensation process, enabling control over molecular alignment and fiber-drawing potential unique to LCP synthesis. Industry compliance standards
Typical usage ratio
Downstream process integration
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In production halls where efficiency meets chemistry, purified terephthalic acid (PTA) operates as a principal building block for polyester materials. Every batch of PTA we run through our reactors connects directly to advances across textile, packaging, and engineering-plastic industries. The primary need pushes us to tighten controls at every turn, since market leaders building reliable polyester resin count on the consistent quality emerging from our reactors. We understand that fiber producers do not tolerate even subtle color inconsistencies that can ripple through their downstream operations. If crystallinity or brightness slides below the agreed threshold, downstream output falters—a costly scenario we’ve worked hard to eliminate year after year.
Drawing on years of direct manufacturing experience, our process centers around a refined oxidation and purification loop. Air, acetic acid, and paraxylene fill up the reactors, running under carefully managed temperature and pressure regimes. The subsequent steps strip out catalyst residues and minimize unwanted byproducts like 4-carboxybenzaldehyde. Final PTA crystals, when properly dried and screened, yield a sharp white powder recognized industry-wide as an indicator of process discipline.
Among the variants we produce, PTA-V999 has become the mainstay for polymer plants seeking the tightest color performance and lowest impurity potential. In every lot, free acid content, iron, manganese, and ash values appear precisely where resin and fiber producers want them. Our in-line spectrometers do not substitute for batch integrity; technicians run constant checks via high-performance liquid chromatography and independent colorimetric trials to maintain assurance, not just chase compliance rows on paper.
Producers in food-grade packaging point toward the absence of detectable aldehydes and notable low trace metals as the hallmark for PTA-V999. Experience shows that even marginal contamination or oxidation residue, easy to overlook in low-volume analysis, leads to bottle browning and preform yellowing over time. We watch these issues from every angle, not only because end users expect crystal clarity, but because we have seen how a properly refined PTA shortens polymerization cycle times and drives down energy consumption for every customer using it.
PTA-V999 leaves our facilities as a fine, free-flowing white powder. Moisture and bulk density get measured alongside core specifications: acid number, DMF solubility, and typical particle size distribution. From a producer’s viewpoint, achieving particle size control below 150 microns means less risk of dust in pneumatic transfer, better dispersion in slurry tanks, and fewer blockages at the feeder hoppers. These practicalities do not appear in specification sheets, but they play out in every batch handled on the customer’s own production line.
End uses dictate the sharpness of these numbers. In melt-phase PET production, low iron and low manganese allow for high transparency without green or yellow tinting creeping through. Low 4-CBA content delivers added process stability, keeping the catalytic system active and efficient. Food packaging applications lean on the near-zero benzoic acid and oxalate values, since discoloration or haze in the final product ties back to the earliest trace elements embedded in the PTA itself.
Our facility’s continuous investments in advanced filtration and solid-liquid separation bring these numbers below targets seen a decade ago. Operators favor automated particle sizers and gravimetric feeders that pull random samples directly from conveyor lines—an approach that keeps every shift attentive and avoids the operator blindness that can creep into high-volume plants relying on batch-end checks only.
In polyester fiber, the impact of raw material purity starts early and grows with scale. PTA-V999 integrates seamlessly in both continuous and batch reactors, supporting stable esterification and transesterification reactions without the formation of particle agglomerates. Large PET and PBT users see fewer filtration challenges, less equipment downtime, and minimal off-spec output when supported by a tried-and-tested PTA supply.
Resin plants putting volumes through solid-state polymerization lines benefit from reliable reactivity, steady IV build, and consistent color across cycles. Technical teams at customer facilities relay that upstream problems usually trace back to overlooked PTA issues—residual aldehydes, unexpected metal spikes, or non-uniform particle cuts—that later disrupt their own finishing operations. Close collaboration between process engineers has highlighted real savings in polymerization energy and maintenance cost because of rigorous PTA quality discipline at our end. These conversations rarely make the data sheets or annual reports but matter far more on the floor.
Industrial users in fields like engineering plastics, especially where polybutylene terephthalate (PBT) finds use for precision molding, describe how our high-assay PTA supports tighter dimensional control in their final parts. The story repeats across sectors: where feedstock reliability exists, fewer disruptions and higher operational efficiency follow.
It’s straightforward to compare numbers from different PTA products—acid value, ash content, color metrics, or trace metal levels—but those who run large plants know that paper spec similarity can mask real-world difference. True differentiation shows up in hands-on performance, not just lab criteria. Our team often hears from customers after they’ve trialed alternate sources, only to come back because of finer powder, easier handling, less dust, or more consistent feed rates.
Some producers focus on selling PTA as a commodity. Yet, in a high-volume manufacturing setting, subtle differences become visible. One lot that clumps in the silo or picks up static in winter loading can cause system-wide hiccups, lost hours, and downstream rejects. We address these factors by aligning technical support with manufacturing execution, feeding back customer handling data into upstream process improvements. As a result, the flowability and reliability of PTA-V999 reflect direct efforts to solve customer-facing challenges before they turn costly.
We have also encountered requests for custom sifted PTA, especially for specialty fiber producers or polymer plants with strict pneumatic feeding requirements. While producing an ultra-fine cut spotlights our flexibility, the bulk of the industry relies on a consistent, free-flowing powder that resists caking and allows continuous feeding even in humid conditions. Having worked closely with major transporters, we also keep an eye on the physical handling bottlenecks that can arise during long-haul shipping, especially in costal environments.
Decades on the manufacturing side have taught us that maintaining a steady PTA output is not enough; adapting to rising quality and environmental standards keeps us competitive. Our investments in catalyst recovery systems and closed-loop solvent purification drive down process waste, benefiting both production costs and environmental footprint.
Traceability has become another point of focus. The ease of tracking every batch from raw material intake through to shipment now stands as standard for international buyers, especially those in food contact or medical polymer markets. Digital monitoring and near-instant batch reporting tools give our clients real-time confidence about what is actually being loaded onto their trucks or ships. Where regulatory certifications demand full evidence of raw material purity, we present the proof, not just the claim.
From personal involvement in third-party audits, it’s clear that customers seek real transparency, not just signed certificates. Demonstrating robust process controls and live batch-coding functionality sets apart partners who live up to their promises—especially as scrutiny grows around process emissions and product traceability in every continent’s regulatory conversations.
Direct feedback from polymer plants and fiber spinners proves invaluable in improving our PTA output. When one major client in the bottle resin industry reported slight haze development at low bottle wall thickness, our technical team coordinated joint analysis sessions. The culprit, an intermittent aldehyde spike traceable to a process vessel anomaly, soon led to targeted vessel retrofits and new alarm points. This line of communication went on to inform our own best practices and earned long-term trust from the client.
Another lesson came from a textile customer observing sporadic dye uptake. After intense troubleshooting, the root cause linked back to changes in residual metal levels during maintenance shutdowns in our reactor cleanouts. Now, cross-checks on every restart have eliminated similar surprises. Each hiccup teaches more than any manual; continuous improvement here means more efficient handling for end users and stronger partnerships built on results, not just words.
Polyester and PBT industries continue to push boundaries with bio-based components, improved recyclability, and alternative catalysts. PTA’s role, though stable, adapts as downstream chemistry evolves. We regularly work with research institutions and polymer innovators searching for new blends, reactor technologies, or color-management solutions. Here, a PTA supplier’s willingness to collaborate and share process insights often means project success or stagnation.
Some advanced polymer projects now test the limits of PTA purity, experimenting with unconventional additives or seeking greater control over carboxyl end group content. In these cases, manufacturing agility, fast turnaround for small-lot custom synthesis, and transparent feedback loops provide essential support for pushing industry innovation forward. New regulatory pressures on antimony, endocrine disruptors, or process emissions all filter back to how we refine and monitor our PTA stocks.
Every metric on the product sheet tells one story; hands-on experience making and supplying PTA to exacting industries tells another. We have learned that refining product performance frequently depends less on monumental process changes than on hundreds of smaller adjustments: modified filtration timing, temperature setpoint stability, operator training, and joint troubleshooting sessions with end users. Reliability in PTA, like reliability in any chemical feedstock, reflects years of iteration and a willingness to listen and adapt to those who work with these products every day.
Our ongoing partnerships across polyester and polymer industries continue to inform the way we make every lot. We pay attention to how PTA behaves in the thick of daily operations, from the moment powder leaves storage silos to when it blends into polymer melts or fiber extruders. Working alongside clients has honed a product lineup tuned for the realities of full-scale production, not just laboratory ideals or specification sheets. This hands-on, responsive approach keeps us a dependable partner to world-leading PET and PBT producers, all building their future products atop a foundation of trusted PTA quality.
