PURIFIED TEREPHTHALIC ACID

Purified Terephthalic Acid is a high-purity aromatic dicarboxylic acid widely used as a key raw material for PET resins and polyester production.
Purified terephthalic acid supports the manufacture of fibers, bottles, films, engineering plastics, and other high-performance polymer products.
Purified terephthalic acid's consistent purity and chemical quality help provide reliable processing, good mechanical properties, and stable end-product performance.

CAS Number: 100-21-0
EC Number: 202-830-0
Molecular Formula: C8H6O4
Molecular Weight: 166.13 g/mol

Synonyms: TEREPHTHALIC ACID, 100-21-0, p-Phthalic acid, 1,4-Benzenedicarboxylic acid, benzene-1,4-dicarboxylic acid, p-Dicarboxybenzene, 1,4-dicarboxybenzene, Acide terephtalique, p-Benzenedicarboxylic acid, p-Carboxybenzoic acid, Tephthol, para-Phthalic acid, Kyselina tereftalova, 4-Carboxybenzoic Acid, TA-33MP, WR 16262, NSC 36973, TA 12, DTXSID6026080, 6S7NKZ40BQ, NSC-36973, DTXCID006080, CHEBI:15702, hydron;terephthalate, 4-oxoniocarbonylbenzoate, P-PTHALIC ACID, RefChem:6289, 202-830-0, 685-562-0, p-Phthalate, Kyselina terftalova, MFCD00002558, Benzene-p-dicarboxylic acid, HSDB 834, terephthalicacid, Acide terephtalique [French], Kyselina tereftalova [Czech], CAS-100-21-0, CCRIS 2786, EINECS 202-830-0, UNII-6S7NKZ40BQ, BRN 1909333, terephtalic acid, AI3-16108, P-Phthelate, P-Phthelic acid, UB7, p-Benzenedicarboxylate, terephthalsäure, Benzene-p-dicarboxylate, benzene-1,4-dioic acid, WLN: QVR DVQ, Terephthalic acid, 97%, Terephthalic acid, 98%, benzoic acid, 4-carboxy-, EC 202-830-0, SCHEMBL1655, para-benzenedicarboxylic acid, Benzene, p-dicarboxylic acid, Terephthalic acid (Standard), 4-09-00-03301 (Beilstein Handbook Reference), BIDD:ER0245, TEREPHTHALIC ACID [MI], orb1299281, orb3025041, SCHEMBL2780243, SCHEMBL8418372, SCHEMBL8873876, CHEMBL1374420, TEREPHTHALIC ACID [HSDB], Benzene, 1,4-Dicarboxylic acid, HMS5085O12, HY-W010098R, NSC36973, STR02759, Tox21_201659, Tox21_303229, EBC-03308, s6251, SBB060285, Terephthalic acid, analytical standard, AKOS000119464, MSK26006-100M, CS-W010814, FT28042, HY-W010098, NCGC00091618-01, NCGC00091618-02, NCGC00091618-03, NCGC00257014-01, NCGC00259208-01, AC-10250, BP-21157, NS00003928, ST50824887, T8031, EN300-18042, C06337, G73905, Terephthalic acid, SAJ special grade, >=98.0%, AE-562/40217759, F358209, p-Phthalic Acid;; Benzene-1,4-dicarboxylic Acid, Q408984, Terephthalic acid Solution in Methanol, 100ug/mL, Terephthalic acid, Vetec(TM) reagent grade, 98%, Z57127536, 211863-90-0, TEREPHTHALIC ACID FOR SYNTHESIS;Terephthalic acid;Terephthalicacid;TEREPHTHALIC ACID/BENZENE-1,4-DICARBOXYLIC ACID;p-Phthalic acid

Purified terephthalic acid is a raw material which is used in the production of high-performance multipurpose plastics like polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT) and even forms of bioplastics.
Purified terephthalic acid also finds its vast usage in the production of polyester fibers in the global market.
They are used to manufacture polyester coating resins for manufacturing general metal, appliances, automotive, industrial maintenance even coil coatings.

Purified terephthalic acid is a high-purity chemical compound commonly used in the production of polyethylene terephthalate (PET).
Polyethylene terephthalate is a polymer widely used, particularly in the manufacture of plastic bottles, textile fibers, and film products.

Purified terephthalic acid is produced via the catalytic liquid-phase oxidation of paraxylene (PX) using acetic acid as a solvent and a cobalt-manganese-bromide catalyst system in the presence of compressed air.
The resulting crude product is then purified through hydrogenation and crystallization to yield high-purity Purified terephthalic acid for polyester manufacturing.

Purified terephthalic acid is a high-purity aromatic dicarboxylic acid primarily used as a key raw material in the production of polyethylene terephthalate (PET) and polyester materials.
Purified terephthalic acid is typically supplied as a white crystalline powder and is valued for its high chemical purity, consistency, and suitability for large-scale polymer manufacturing.
Purified terephthalic acid is widely used in polyester fibers, Polyethylene terephthalate bottles, packaging films, engineering plastics, coatings, and other polymer-based applications where controlled quality and reliable processing performance are required.

Purified terephthalic acid is an organic compound with formula C6H4(CO2H)2.
The main raw material for polyethylene terephthalate (PET) and polyester fibers is produced by oxidizing paraxylene.

Polyester fibers are used mainly in rugs, clothing, furniture and industrial applications, as well as other consumer products.

Purified terephthalic acid is a key chemical intermediate used primarily in the production of polyester, which is utilized in making clothing, plastic bottles, and other materials.
The manufacturing process of Purified terephthalic acid involves the catalytic liquid phase oxidation of paraxylene in acetic acid, in the presence of air. 

Terephthalic acid is the organic compound with formula C6H4(COOH)2.
Purified terephthalic acid is a commodity chemical, used principally as a precursor to the polyester Polyethylene terephthalate, used to make clothing and plastic bottles.

Several million tones are produced annually.
Purified terephthalic acid is one of three isomeric phthalic acids.

Purified terephthalic acid is benzene-1,4-dicarboxylic acid.
Purified terephthalic acid is a white crystalline powder with slight acidic odor.

Purified terephthalic acid is mainly used in the production of polyester products, including polyethylene terephthalate (PET).
Purified terephthalic acid is used to manufacture polyester coatings resins for use in the formulation of general metal, appliance, automotive, industrial maintenance, and coil coatings.

The primary application for Purified terephthalic acid is in combination with Eastman NPG™ Glycol in polyester powder coating resins.
Purified terephthalic acid has also been used in unsaturated polyesters for fiberglass-reinforced plastics applications.

The aromatic ring of Purified terephthalic acid imparts excellent hardness and corrosion and stain resistance to coatings resins and unsaturated polyesters.
Purified terephthalic acid has moderate solubility in molten glycols which can increase synthesis times, and it imparts moderate solubility to resins.

Purified terephthalic acid is manufactured by the catalytic liquid-phase oxidation of paraxylene (PX) using an acetic acid solvent and an air/cobalt-manganese catalyst to form crude terephthalic acid (CTA), followed by hydrogenation, crystallization, and drying to remove impurities like 4-carboxylbenzaldehyde (4-CBA).

Purified terephthalic acid is a white crystalline powder derived from crude terephthalic acid through oxidation and purification of para-xylene.
The high purity of Purified terephthalic acid ensures consistency in polymer reactions and is especially valuable for producing high-quality poly terephthalic acid resins used in a variety of applications.

Unlike iso terephthalic acid, which is used in specialty polyesters, Purified terephthalic acid is the primary component in polyethylene terephthalate (PET), contributing to nearly 90% of global polyester production.
This makes pta acid an indispensable raw material in industries ranging from packaging and textiles to automotive and construction.

Purified terephthalic acid is a white crystal or powder that is low in toxicity and flammable.
Purified terephthalic acid's chemical formula is C8H6O4, with a density of 1.55 g/cm³ and a melting point of 300°C.

Purified terephthalic acid is slightly soluble in hot ethanol and insoluble in water.
This substance is produced using p-xylene as the raw material.

Through high-temperature liquid-phase oxidation at 221-225°C and 2.5-3.0 MPa, Purified terephthalic acid yields crude terephthalic acid, which is then manufactured into the final product via processes such as hydrogenation refining and crystallization.
Purified terephthalic acid is primarily used in the production of polyethylene terephthalate (PET), dioctyl terephthalate (DOTP), and dye intermediates.

Purified terephthalic acid is stable under normal conditions.
Purified terephthalic acid's heat of combustion is 3225.9 kJ/mol, its boiling point is 392.4°C, and its flash point is 260°C.

Purified terephthalic acid is an important organic compound.
The PTA chemical full form is purified terephthalic acid, which appears as a white powder with a molecular formula of C6H4(CO2H)2.

Purified terephthalic acid's self-ignition point is 680 ℃ and the ignition point is 384–421 ℃.
Pure terephthalic acid has low toxicity but shows a certain irritant effect on the skin and mucous membranes.

Purified terephthalic acid can dissolve in hot ethanol and alkaline solutions.
Purified terephthalic acid is obtained through petroleum processing, extraction, and chemical reaction, and this PTA chemical is mainly used to produce polyester.

Purified terephthalic acid is a key raw material for chemical fiber products, including polyester fibers (polyester), polyester films, and polyester bottle sheets.
As one of the leading purified terephthalic acid suppliers, Neo Lianda is dedicated to providing high-purity purified terephthalic acid for a wide range of industrial applications.

Uses of Purified Terephthalic Acid:
Purified terephthalic acid is used in wool processing and making plastic films and sheets.
Purified terephthalic acid is also added to poultry feeds and to certain antibiotics to increase their effectiveness.

Purified terephthalic acid is the main raw material for producing polyester fiber.
Purified terephthalic acid can directly undergo esterification and polycondensation with Ethylene glycol to obtain polyester, be made into engineering polyester plastic, and serve as a raw material for plasticizers and as a dye intermediate.

Purified Terephthalic Acid is primarily used as a major raw material in the production of polyethylene terephthalate (PET) resins.
Purified terephthalic acid is widely used in the manufacture of polyester fibers for textiles, industrial fabrics, and nonwoven materials.

Purified terephthalic acid is also used to produce Polyethylene terephthalate bottles, food and beverage containers, packaging films, and thermoformed sheets.
In the plastics industry, Purified terephthalic acid serves as an important intermediate for engineering polymers and specialty polyester materials.

Purified terephthalic acid is additionally used in certain coatings, adhesives, plasticizers, and alkyd or polyester resin formulations.
Purified terephthalic acid's high purity makes it suitable for applications requiring consistent polymer quality, good color, mechanical strength, and processing stability.

Industry Uses:
Adhesion/cohesion promoter
Intermediate
Not Known or Reasonably Ascertainable
Filler
Monomers
Other
Binder
Solvent

Consumer Uses:
Not Known or Reasonably Ascertainable
Monomers

Applications of Purified Terephthalic Acid:
Purified terephthalic acid is a key industrial chemical primarily used as a precursor in the manufacture of polyester fibers and polyethylene terephthalate (PET), which are integral to producing clothing and plastic bottles.
This white crystalline solid, characterized by its limited solubility, is processed to achieve high purity levels necessary for its role in these applications.

As one of the isomers of benzenedicarboxylic acid, Purified terephthalic acid is essential in fulfilling the global demand for synthetic materials, contributing to the production of millions of tonnes annually.
Beyond textiles and packaging, Purified terephthalic acid is also utilized in producing polybutylene terephthalate and other engineering polymers, underscoring its versatility and significance in various industrial sectors.

Polyethylene Terephthalate (PET) Production:
Purified terephthalic acid is used as a key component in Polyethylene terephthalate production.
Polyethylene terephthalate is a common material for plastic bottles, food packaging, textile fibers (especially polyester), film, and other plastic products.
Purified terephthalic acid forms the basic building blocks of Polyethylene terephthalate by being used in the polymerization process.

Textile Industry:
Purified terephthalic acid is used in polyester production and is widely involved in the production of polyester yarns, fabrics, and other textile products.
Polyester is preferred in the textile industry due to its durability and low cost.

Industrial Chemical Production:
Purified terephthalic acid is also used in the production of some chemical products.
However, Purified terephthalic acid can also be involved in heavy industrial chemical processes and the production of other polymers.

Film and Packaging Materials:
Purified terephthalic acid is also an important compound in the production of film and packaging materials, especially in the manufacture of transparent and durable plastics.

Advantages of Purified Terephthalic Acid:

High Purity:
Purified terephthalic acid is essential for high-quality Polyethylene terephthalate production because it has a very high purity.
This is important for the durability and functionality of the final product.

Environmentally Friendly Production:
Since Polyethylene terephthalate is a recyclable material, products manufactured using Purified terephthalic acid can be an environmentally friendly option.
Furthermore, some Purified terephthalic acid production processes have been made more environmentally friendly and energy efficient.

Features of Purified Terephthalic Acid:

Chemical Stability:
Purified Terephthalic Acid is chemically stable at room temperature and pressure, and is not easily decomposed or deteriorated.
Purified terephthalic acid can maintain high quality during storage and transportation.

High Purity Requirements:
Only high-purity pure terephthalic acid can ensure the quality and performance of polyester products.
During the production process, strict refining techniques are required to remove impurities.

Versatile Applications:
Not only can Purified terephthalic acid be used to produce traditional products such as polyester fibers, polyester films, and polyester bottle sheets, but it can also be used to produce high-performance polymer materials such as poly (p-phenylene terephthalamide) (PBT), as well as raw materials for chemical products such as plasticizers and dye intermediates.

Environmentally Friendly:
The production and use of Purified Terephthalic Acid have a relatively small impact on the environment.

Properties of Purified Terephthalic Acid:
Purified terephthalic acid is a white crystal or powder with low toxicity and is flammable.
When mixed with air within certain limits, Purified terephthalic acid will ignite and may even explode upon encountering a flame.

Purified terephthalic acid's autoignition temperature is 680°C, ignition point is 384–421°C, sublimation heat is 98.4 kJ/mol, heat of combustion is 3225.9 kJ/mol, and density is 1.55 g/cm³.
Purified terephthalic acid is soluble in alkaline solution, slightly soluble in hot Ethyl Alcohol, and insoluble in water, Ethyl ether, acetic acid, and chloroform.

Production of Purified Terephthalic Acid:
Terephthalic acid is produced primarily from hydrocarbons such as xylene (especially ortho-xylene and para-xylene) through oxidation.
Purified terephthalic acid is a purified version of terephthalic acid and is typically obtained through processes such as catalytic oxidation and filtration.
This purification process ensures that the purity of terephthalic acid reaches levels of 99.9% or higher.

At first step of production process, Crude Terephthalic Acid (CTA) is produced through catalytic liquification and oxidation among air, paraxylene (as main raw material) and acetic acid (as solvent) and then the CTA is hydrogenated to remove the impurities and then is separated and dried to produce fibre grade Purified terephthalic acid.

Stability and Reactivity of Purified Terephthalic Acid:

Chemical Stability:
Stable under recommended storage and handling conditions.

Reactivity:
Generally low under normal conditions but may react with strong oxidizing agents and strong bases.

Conditions to Avoid:
Excessive heat, dust formation, ignition sources, and contact with incompatible materials.

Incompatible Materials:
Strong oxidizing agents, strong bases, and highly reactive chemicals.

Handling and Storage of Purified Terephthalic Acid:

Safe Handling:
Avoid generating or inhaling dust and prevent prolonged contact with skin and eyes.

Storage Conditions:
Store in a tightly closed container in a cool, dry, well-ventilated area away from heat and incompatible substances.

First Aid Measures of Purified Terephthalic Acid:

Inhalation:
Move the affected person to fresh air and obtain medical attention if irritation or breathing discomfort persists.

Skin Contact:
Wash thoroughly with soap and plenty of water and remove contaminated clothing.

Eye Contact:
Rinse cautiously with water for several minutes and seek medical attention if irritation continues.

Ingestion:
Rinse mouth and obtain medical advice if discomfort occurs.

Firefighting Measures of Purified Terephthalic Acid:

Suitable Extinguishing Media:
Use water spray, foam, dry chemical, or carbon dioxide according to the surrounding fire conditions.

Special Hazards:
Thermal decomposition may produce carbon monoxide, carbon dioxide, and irritating fumes.

Protective Equipment:
Firefighters should wear appropriate protective clothing and self-contained breathing apparatus.

Accidental Release Measures of Purified Terephthalic Acid:

Personal Precautions:
Avoid dust formation, provide adequate ventilation, and wear suitable protective equipment.

Cleanup Methods:
Carefully sweep or vacuum the spilled material and place it in a suitable closed container for disposal.

Environmental Precautions:
Prevent large quantities from entering drains, waterways, or soil.

Exposure Controls/Personal Protective of Purified Terephthalic Acid:

Engineering Controls:
Use adequate general ventilation or local exhaust ventilation where dust may be generated.

Eye Protection:
Wear safety glasses or chemical-resistant goggles.

Hand Protection:
Use suitable protective gloves.

Skin Protection:
Wear appropriate work clothing to minimize prolonged contact.

Respiratory Protection:
Use suitable particulate respiratory protection when dust concentrations cannot be adequately controlled.

Identifiers of Purified Terephthalic Acid:
IUPAC Name: Benzene-1,4-dicarboxylic acid
CAS Number: 100-21-0
EC Number: 202-830-0
Molecular Formula: C8H6O4
Molecular Weight: 166.13 g/mol
Chemical Family: Aromatic Dicarboxylic Acids

Product: Purified Terephthalic Acid
CAS: 100-21-0
Synonym: 1,4-Benzenedicarboxylic acid

Properties of Purified Terephthalic Acid:
Appearance: White crystalline powder or solid
Odor: Odorless
Molecular Formula: C8H6O4
Molecular Weight: 166.13 g/mol
Density: approx. 1.52 g/cm³

Appearance: White crystals or powder
Density: 1.51 g/cm3
Melting point: >300 °C
Molecular Weight: 166.13
Odor: Odorless
Purity: 98%
Refractive index: 1.5100

IUPAC Name: benzene-1,4-dicarboxylic acid
Molecular Formula: C8H6O4
Molecular Weight (g/mol): 166.1300
Synonyms & Trade Names: Purified terephthalic acid; PTA; 1,4-Benzenedicarboxylic acid
Purity / Assay (%): 99.5% min
Grade / Quality Level: Industrial Grade
Physical Form: Solid
Concentration: Pure substance
Appearance / Color: White to off-white solid

Odor: Odorless
Melting Point (°C): 300.0000
Boiling Point (°C): >300
Density (g/cm³): 1.5430
Solubility in Water: Slightly soluble
Signal Word: Warning
GHS Hazard Class: Skin sensitizer; Reproductive hazard
H-Statements: H317|H361
P-Statements: P201|P261|P272|P280|P308+P313
REACH Status: Registered
Drug Precursor Status: Non-precursor

Molecular Weight: 166.13 g/mol
XLogP3: 2
Hydrogen Bond Donor Count: 2
Hydrogen Bond Acceptor Count: 4
Rotatable Bond Count: 2
Exact Mass: 166.02660867 Da
Monoisotopic Mass: 166.02660867 Da
Topological Polar Surface Area: 74.6 Ų
Heavy Atom Count: 12
Complexity: 169
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes