High Purity Trimellitic Anhydride CAS 552-30-7

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Trimellitic Anhydride

Products Description

Name: Trimellitic Anhydride Powder

Cas: 552-30-7

Purity: 99%min


Basic Info:







Stock Availability

In stock

Brand Name

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Product Introduction:

Trimellitic Anhydride, scientific name trimellitic anhydride, also known as partial anhydride, molecular formula is C9H4O5. The appearance is white flakes, the melting point is 164-166°C, and the boiling point is 240-245°C.

Trimellitic Anhydride is soluble in boiling water, acetone, 2-J ketone, dimethylformamide, ethyl acetate and cyclohexanone. During the reaction, it is soluble in absolute ethanol, slightly soluble in carbon tetrachloride and toluene.

Trimellitic Anhydride powder is mainly used for PVC resin plasticizers, polyimide resin coatings, water-soluble alkyd resins, epoxy resin curing agents, low-pressure/pulse power container impregnants, thin films, water treatment agents, surfactants, etc. 

Product Nature:

  • Density: 1.54

  • Boiling point: 390 °C

  • Melting point: 163-166 °C(lit.)

  • Flash point: 227 °C

  • Refractive index: 1.662

  • Water solubility: DECOMPOSES


Product NameTrimellitic Anhydride Powder
CAS No.552-30-7
Appearance White crystalline powder
Content99% min
Shelf Life2 years
Packing1kg/bag,25kg/bag or as your requirements

Product function:

  1. Used as a plasticizer
    • As a plasticizer, Trimellitic Anhydride has many advantages such as high relative molecular weight, high fluidity, high flash point, low volatility, resistance to various solvent extractions, and low migration resistance.
    • In addition, the benzene polyacid plasticizer has good compatibility with polymer materials, especially PVC materials, and its processability and low temperature performance are similar to those of phthalic acid monomers.
    • Therefore, Trimellitic Anhydride Powder has the advantages of both monomer and polyester plasticizer. It can be used as the main plasticizer for general civilian products, and it can also be used as a cable material with a wider range of applications at 105°C and 125°C. Decorative materials for automotive applications, high-grade spinning oil, impregnating oil for pulsed low-voltage power capacitors, electronic chemicals, and high-tech military products.
  2. Used as a coating and curing agent for epoxy resin
    • The coating industry is moving in the direction of non-toxic and flame-retardant. Using Trimellitic Anhydride and water-soluble resin coatings such as monoethylene glycol, hexanediol, propylene glycol, neopentyl glycol, etc., new water-soluble alkyd resin coatings can be obtained, which can be used in automobiles, refrigerators, etc. .. Electrophoretic coating primer for washing machines, etc.
    • Trimellitic Anhydride can cure epoxy resin in a short time and has excellent physical and chemical properties. It is an ideal epoxy resin curing agent.
    • Trimellitic acid esters can also be used as curing agents. For example, Trimellitic Anhydride reacts with ethylene glycol diacetate to produce ethylene glycol bis(trimellitic acid) ester. This compound reacts with epoxy resin to form heat resistance. Excellent adhesives and coatings.
    • The solid resin obtained by the equimolar reaction of Trimellitic Anhydride owder with glycerin is soluble in solvent and has excellent adhesion to glass and aluminum.
  3. Polymer materials and surfactants
    • Use tribasic acid anhydride and higher fatty alcohols such as lauryl alcohol and stearyl alcohol to control the molar ratio and carry out mono-esterification and double-esterification reactions. Then use NaOH to neutralize the free carboxyl groups of Trimellitic Anhydride to prepare excellent sodium trimellitate anion. Surface active surfactants.
  4. Insulating paint
    • Trimellitic Anhydride can be used as a material for electrical equipment such as glass cloth impregnated laminated resin, heat-resistant covering material, wire insulation varnish, and motor tank insulators.
    • Used as F-class and H-class insulating materials required for electrodes, home appliances, and power tools, such as enameled wire paint, dipping paint, silicon steel plate paint, film, etc.
    • The benzimide resin prepared by the reaction of Trimellitic Anhydride and N,N-diphenyl aromatic diamine can withstand long-term heating at 250-300℃ and can be used for electrical parts, valves, bearings, jet engine parts, etc. Used in manufacturing. Plastic parts.
  5. Other
    • Alkyd resin coatings synthesized by the reaction of Trimellitic Anhydride with polyols and dicarboxylic acids have excellent stability, water resistance and heat resistance, and are electrophoretic coatings for automobiles, refrigerators, washing machines, electrical appliances and mechanical products. Can be used as primer. Surface coatings for kitchens and furniture can also be used as industrial building materials and general coatings.


  1. Röhrscheid, Freimund (2000). “Carboxylic Acids, Aromatic”. Ullmann’s Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a05_249.
  2. Wikipedia


Pre-Sales Service

* Timely reply and 24 hours online, the professional team will provide you with the most favorable prices and high-quality products.

* The sample supports testing and inspection.

* Each batch of products will be tested to ensure that its quality meets user needs.

*Packaging can also be made according to customer requirements.

*Any inquiries will be answered by our relevant personnel within 24 hours.

*We will provide you with commercial invoice, packing list, packing list, COA, health certificate and certificate of origin if you need it. If your market has other special requirements, please let us know.


After-Sales Service

*We will monitor the logistics information in real time and will share the information with you.

* You can consult us at any time if you have any questions about the product, and we will answer you in time.

*If you have any questions about the product, you can report it to us, we will deal with it in time for you, and the product can be returned.


1. ≤50kg, we recommend express delivery, usually called DDU service;

2. ≤500kg, air transportation is generally recommended, usually called FOB, CFR or CIF service;

3.>500kg, sea freight is generally recommended, usually called FOB, CFR or CIF service;

4. For high-value products, please choose air and express to ensure the safety of the products.


Do you accept sample order?

We will make samples before mass production. After the samples are approved by the department and users, we will start mass production. During the production process, we will carry out 100% inspection, and then carry out random inspection before packaging.

How to confirm whether the product quality meets our needs before placing an order?

You can consult us to get free samples of some products, you only need to pay the freight or arrange express delivery to us and get the samples. You can send us the product specifications and requirements you need, and we will manufacture products according to your requirements.

What’s your MOQ?

Our MOQ is 1kg. But usually we can also accept a smaller quantity, such as 100g, if you need it, provided that the sample fee is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.

Learn more about us

Contact us for the latest quotation and free samples of Trimellitic Anhydride Powder

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Packaging and shipping

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Trimellitic Anhydride