Purified Terephthalic Acid (PTA) CAS100-21-0

Purified terephthalic acid (PTA) is a core raw material in the polyester industry chain. It is produced from paraxylene (PX) through oxidation and refining, achieving a purity of over 99.9%.

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Product Description

The product has extremely low impurity content, with 4-CBA controlled below 25 ppm and total heavy metals controlled below 5 ppm. It exhibits good reactivity and stable polymerization performance, making it an ideal raw material for producing polyester products such as polyester fibers, polyester chips, and polyester films. The product strictly adheres to national standards such as GB/T 32685-2016. A full range of grades, including fiber grade, chip grade, and film grade, are available. With access to major ports such as Qingdao Port, Tianjin Port, and Shanghai Port, exports are compliant, efficient, and hassle-free throughout the entire process.

Product Information

ItemDescription
Product NamePurified Terephthalic Acid (PTA)
CAS No.100-21-0
EINECS No.202-830-0
Molecular FormulaC₈H₆O₄
Molecular Weight166.13
AppearanceWhite crystalline powder
Main TypesFiber Grade: Purity ≥99.9%, for polyester filament and staple fiber production.
Bottle Grade: Purity ≥99.9%, for bottle-grade PET resin production.
Film Grade: Purity ≥99.9%, for polyester film production.
Engineering Plastic Grade: for PBT and PET engineering plastics production.
Key Physical & Chemical PropertiesAppearance: White crystalline powder; Density: approx. 1.55 g/cm³; Melting Point: approx. 300℃ (decomposes); Sublimation Point: approx. 402℃; Solubility: insoluble in water, ether, chloroform; soluble in concentrated sulfuric acid; slightly soluble in ethanol; chemically stable; combustible.
Typical Quality SpecificationsPurity (as PTA) : ≥99.9%; Acid Value (mgKOH/g) : 675±2; Moisture: ≤0.2%; Ash: ≤8 ppm; 4-CBA: ≤25 ppm; p-TA: ≤150 ppm; Total Heavy Metals: ≤5 ppm (Fe, Co, Mn, Cr, etc.); Color (APHA) : ≤10; Particle Size: fine powder, average 90-150μm.
FeaturesUltra-high purity with low impurities; good reactivity and stable polymerization performance; stable acid value for consistent downstream processing; excellent color purity ensuring polyester transparency; low metal content suitable for food contact grade polyester; stable quality suitable for continuous large-scale production.
Main ApplicationsPolyester Fiber (largest application, approx. 75% of PTA consumption) : Polyester filament (POY/DTY/FDY) for apparel and home textiles; Polyester staple fiber for pure spinning or blending; Industrial yarn for tire cord fabric and conveyor belts.
Polyester Bottle Resin: Mineral water bottles, carbonated beverage bottles, hot-fill bottles, edible oil bottles.
Polyester Film: Food/pharmaceutical packaging film, capacitor insulation film, optical film, magnetic tape substrate.
Engineering Plastics: Modified for automotive parts, electrical components, electronic parts.
Packaging25kg woven bags (PE liner); 500-1000kg jumbo bags (moisture-proof sealed); custom packaging available.
Storage ConditionsStore in cool, dry, well-ventilated warehouse, away from direct sunlight and high humidity. Stack height ≤5 layers; protect from moisture and rain; away from fire and oxidizers.
Shipping RequirementsNon-hazardous cargo; protect from moisture and rain; handle with care; bulk transport uses dedicated tank trucks.
Quality StandardsChina: GB/T 32685-2016; Export reference: ASTM D788, JIS K 8089; Food contact grade: FDA 21 CFR 177.1630, EU 10/2011; REACH, RoHS available.
Minimum Order QuantityStandard 20-25 tons (1×20'FCL or truck); trial order 5-10 tons (bags) negotiable.
Delivery TimeStandard 7-15 working days; custom/special grades 15-25 working days.


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FAQ

Q1: Is Huafeng Chemical a manufacturer or a trader?
A: We are a professional service provider specializing in chemical foreign trade. Rather than being limited to the products of a single factory, we leverage the chemical industry cluster in Shandong Province to integrate production resources from multiple high-quality manufacturers. This allows us to offer a wide range of sourcing options—covering various product categories and origins—instead of simply pushing a single product. Furthermore, our core competitiveness lies in our professional foreign trade services (covering documentation, logistics, and regulatory compliance), ensuring a smooth and worry-free procurement process for you.


Q2: How is the security of my transaction guaranteed when working with Huafeng Chemical?
A: We strictly adhere to international trade rules (Incoterms® 2020) and accept various payment methods, such as Letters of Credit (L/C) and Telegraphic Transfers (T/T). For new clients, we support small-batch trial orders and can clearly define arbitration clauses and applicable laws within the contract. Additionally, we maintain a robust risk management system to help you mitigate common trade risks, such as exchange rate fluctuations, shipping delays, and document discrepancies.


Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

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