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Home > Organic Chemistry > Carboxylic Acids and Derivatives > Isophthalic acid for Sale > High Purity Industrial Isophthalic Acid at Optimized Factory Direct Price
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High Purity Industrial Isophthalic Acid at Optimized Factory Direct Price

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Unit Price:

$800-1000/MT FOB

Get Latest Price
CAS No.:

121-91-5

Grade:

Industrial Grade

Content:

99.9%

Port:

QINGDAO

Brand:

CENKE

Packaging:

25kg woven plastic bags

Price valid (until):

2026-07-21

Company Type:
Trader
Location:
China
Qualification:
Main Products:

Propylene glycol,Isopropyl alcohol,Ethylene glycol,Diethylene glycol,Ethanol,Dimethyl carbonate

  • Product Description

  • Seller Information

  • Inquiry History

  • Description

    The core applications of isophthalic acid are concentrated in the polymer synthesis and coatings industries; it serves as a key dicarboxylic acid monomer for the production of unsaturated polyester resins, modified PET, and polyimides. When used in powder coatings and water-based industrial paints, it significantly enhances the weather resistance, corrosion resistance, and adhesion of the paint film, reduces the likelihood of coating cracking and yellowing, and is suitable for coating outdoor building materials and metal equipment. In the polyurethane and engineering plastics sectors, it optimizes material toughness, heat resistance, and tensile strength, enabling the production of high-temperature-resistant adhesives and glass-fiber-reinforced plastics. It also serves as a raw material for organic synthesis intermediates in the pharmaceutical and pesticide industries, contributing to the preparation of various aromatic derivatives; Small quantities of high-purity grades can be used as reagents for laboratory chemical analysis. This product offers strong compatibility and can be blended with polyols, epoxy resins, and curing agents. Its downstream applications span multiple sectors, including packaging bottles and sheets, automotive coatings, corrosion-resistant pipes, and composite adhesives. It is an irreplaceable basic aromatic carboxylic acid raw material in the polyester industry chain, with stable market demand and suitability for industrial-scale continuous production.

    The product strictly complies with the GB/T 2961-2014 national standard, accompanied by a complete set of MSDS, commodity inspection reports, and hazardous packaging certificates, and meets EU REACH import and export requirements. Standard packaging includes 200 kg galvanized closed-top steel drums and 1,000 L IBC containers. For large volumes, bulk transport via tank containers is available. Storing and transporting the product in a sealed, light-protected environment effectively delays oxidation and discoloration. Supply is stable and ample, supporting full-container and consolidated shipments for international trade, and meeting global chemical procurement and custom fine chemical production needs.

    Items Specifications
    Product Name Isophthalic Acid
    CAS 121-91-1
    Product Grade Industrial Grade
    Country of Origin Shandong, China

    Cenke Chemical was formally established in 2016, with its corporate headquarters strategically located in Dongying City, Shandong Province, a core hub for China’s petrochemical and new material industrial cluster. We operate as a professional integrated chemical trading enterprise dedicated to the global procurement, distribution and stable supply of premium industrial chemical products for worldwide manufacturers and industrial clients.

    Our comprehensive product portfolio covers full-spectrum chemical categories, including basic bulk chemical raw materials, fine chemical intermediates, advanced innovative new materials and high-performance functional specialty materials. Each product line undergoes strict quality screening to meet international industrial standards, catering to diversified production and R&D demands across dozens of core industrial sectors.

    We serve long-term cooperative customers spanning petrochemical processing, plastic manufacturing, pharmaceutical synthesis, water treatment, coating & paint, rubber production, textile printing and dyeing, new energy materials, environmental protection engineering and other key industries worldwide. Leveraging robust upstream factory partnerships, complete logistics support, standardized export packaging and efficient customs clearance capabilities, we deliver cost-effective, on-time and secure one-stop material supply solutions, building mutually beneficial long-term partnerships with suppliers and buyers globally.

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    Certificates

    Basic Info
    Product Name:

    Isophthalic acid

    Other Name:

    1,3-Benzenedicarboxylic acid;Isophthalic acid;m-Benzenedicarboxylic acid;m-Phthalic acid;m-Dicarboxybenzene;m-Carboxybenzoic acid;Isoterephthalic acid;m-Phthalic acid;3-Carboxybenzoic acid;NSC 15310;55185-18-7;2088100-84-7

    CAS No.:

    121-91-5

    Molecular Formula:

    C8H6O4

    InChIKeys:

    InChIKey=QQVIHTHCMHWDBS-UHFFFAOYSA-N

    Molecular Weight:

    16613

    Exact Mass:

    166.13

    EC Number:

    204-506-4

    UNII:

    X35216H9FJ

    ICSC Number:

    0500

    NSC Number:

    15310

    DSSTox ID:

    DTXSID3021485

    Color/Form:

    Crystalline powder|Colorless crystals|Needles from water or alcohol

    HScode:

    29173980

    Characteristics
    PSA:

    74.6

    XLogP3:

    1.7

    Appearance:

    White to off-white; Crystalline Powder

    Density:

    1.507 g/cm3 @ Temp: 20 °C

    Melting Point:

    347 °C

    Boiling Point:

    100 °C

    Flash Point:

    217.3±20.5 °C

    Refractive Index:

    1.5100 (estimate)

    Water Solubility:

    H2O: 001 g/100 mL (25 ºC)

    Storage Conditions:

    Store below +30°C

    Vapor Pressure:

    2.6X10-8 mm Hg at 25 deg C(est)

    Henrys Law Constant:

    Henry's Law constant = 2.18X10-12 atm-cu m/mol at 25 °C(est)

    Dissociation Constants:

    pKa1 = 3.70; pKa2 = 4.60 at 25 °C

    Experimental Properties:

    Heat of formation: -802 kJ/mol at 25 °C|Heat of sublimation: 106.7 kJ/mol at 25 °C|log Kow = -2.34 at pH 7 (OECD 107 method)|Hydroxyl radical reaction rate constant = 1.3X10-12 cu cm/molecule-sec at 25 °C (est)

    Air and Water Reactions:

    Dust forms explosive mixture in air (USCG, 1999).

    Reactive Group:

    Acids, Carboxylic

    Reactivity Profile:

    ISOPHTHALIC ACID is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in it to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.

    Autoignition Temperature:

    700 °C

    Physical Dangers:

    Dust explosion possible if in powder or granular form, mixed with air.

    Heat of Vaporization:

    1.0921X10+8 J/kmol at the melting point of 619.15 K (346 °C)

    Critical Temperature & Pressure:

    Critical temperature = 1007.00 K; Critical pressure = 3.9500X10+6 Pa

    Hazard Identification

    Classification of the substance or mixture

    Not classified.

    GHS label elements, including precautionary statements

    Pictogram(s) No symbol.
    Signal word

    No signal word

    Hazard statement(s)

    none

    Precautionary statement(s)
    Prevention

    none

    Response

    none

    Storage

    none

    Disposal

    none

    Other hazards which do not result in classification

    no data available

    Handling and Storage

    Precautions for safe handling

    NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

    Conditions for safe storage, including any incompatibilities

    Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

  • Seller Information
    Business Type:

    Trader

    Main Products:

    Propylene glycol,Isopropyl alcohol,Ethylene glycol,Diethylene glycol,Ethanol,Dimethyl carbonate

    Location:

    Room 404, Building 18, No.699 Huashan Road, Dongying City, Shandong Province.

    Payment Terms:

    TT against copy of documents,D/P,L/C,TT against B/L draft before shipment

    Average lead Time:

    15

    Total Annual Revenue:

    $5 million-$10 million

    Total Employees:

    11-50

    Year of Establishment:

    2025

    Shandong Cenke Chemical Co.,Ltd founded in 2016 and headquartered in Dongying City,Shandong province.We are a chemical trading company,focus on the global supply of industrial chemical products. Our business covers a wide range of products, including chemical raw materials, chemical intermediates, new and functional materials,serving customers across multiple industrial sectors.

        Chemical raw materials form the foundation of our supply, supporting stable and large-scale industrial production. Chemical intermediates are supplied to meet the technical requirements of coatings, resins, agrochemical, electronics and fine chemical manufacturing.

        In parallel, we continue to develop and supply new materials that respond to evolving industrial and application-specific demands. Beyond product sourcing, we emphasize supply chain integration, quality control and logistics coordination.

        With our own warehousing resources and port-adjacentstorage facilities, we support flexible packaging options, including Iron drums,IBC drums, ISO TANK and bulk transportation.Today Cenke chemical serves partners in more than 60 countries and regions.For example, the Middle East, Africa, Europe, Southeast Asia, the United States, and the Indian subcontinent, among other major international markets.

        We are committed to building long-term partnerships with our collaborators. We consistently deliver premium services, pledging to provide you with the finest experience. We contemplate the future with care, offering comprehensive support to our clients. We always have your best interests at heart, planning for the future!

  • Inquiry History
    23 Inquiries
    Country Product Purchase Quantity Date Posted
    Qatar

    Isophthalic Acid

    100 MT Jun 24, 2026
    India

    isophthalic acid

    1 KG Apr 7, 2026
    Bangladesh

    isophthalic acid

    1 KG Jul 14, 2025
    India

    Isophthalic Acid

    450 TON Jun 3, 2025
    South Korea

    purified isophthalic acid

    20 MT Jun 2, 2025
    India

    Isophthalic acid

    500 MT May 26, 2025
    United Arab Emirates

    ISOPHTHALIC ACID

    500 KG Apr 23, 2025
    India

    Isophthalic ACID

    100.00 MT Feb 26, 2024
    Saudi Arabia

    Isophthalic Acid

    1 TON Aug 10, 2023
    Brazil

    Isophthalic Acid

    1000 KG Feb 25, 2026
    Qatar

    Purified isophthalic acid (PIA)

    1.00 40' Fcl Oct 13, 2025
    Qatar

    Purified Isophthalic Acid

    1.00 40' Fcl Aug 1, 2025
    India

    Isopthalic acid

    100.00 KG Jul 1, 2025
    India

    Isophthalic Acid

    300 MT May 12, 2025
    India

    Isophthalic acid

    1000 KG Jul 22, 2024
    Italy

    PIA (PURIFIED ISOPHTHALIC ACID)

    20 MT May 28, 2024
    India

    Isophthalic acid powder

    30.00 MT May 11, 2024
    Uzbekistan

    Isophtalic acid

    1600 TON Apr 1, 2024
    Indonesia

    Isopthalic Resin

    1000.00 KG Oct 27, 2023
    India

    Isophthalic Acid

    300 MT Jun 16, 2025
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