Phthalic Anhydride CAS 85-44-9

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  • Appearance: White powder
  • Assay: 99. 0%min
  • Stock: In stock
  • Sample: Available
  • Zhishang Chemical: Phthalic Anhydride Supplier & Manufacturer

Basic Info

What is Phthalic Anhydride?

Phthalic anhydride, likewise called o-phthalic anhydride, is a vital organic chemical resources. It is a global anti-scorch agent for natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber and also nitrile rubber. It can protect against blister, enhance Functional safety. It has little impact on the vulcanization time as well as the aging residential or commercial properties of the item. It is specifically efficient for substances containing thiazole-guanidine and thiazole-thiuram accelerators as well as compounds outfitted with alkaline accelerators, however is not ideal for thiuram sulfur-free vulcanization systems. It is very easy to distribute, does not spray frost, and has little contamination, however the white rubber will certainly additionally slightly transform color when subjected to light, so it is usually not suitable for white rubber. Phthalic anhydride and sodium carbonate can increase the frothing effect when made use of in high-promoting sponge products.

The primary use of phthalic anhydride is for the production of phthalate plasticizers, adhered to by the manufacturing of alkyd resins as well as amino resin finishes; phthalic anhydride can be made use of in the manufacturing of unsaturated polyesters and in the synthesis of anthraquinones in the dye industry; Synthesize phthalocyanine blue CK, phthalocyanine blue CT, phthalocyanine blue C and other pigments in the manufacturing of pigments; in the pharmaceutical industry for the prep work of phenolphthalein; in the production of chemicals for the production of intermediates such as imidophos. Phthalic anhydride and also polyols (such as glycerol, pentaerythritol) are polycondensed to create polyarylate resins, which are utilized in the paint market; if polycondensed with ethylene glycol and also unsaturated acids, unsaturated polyester resins can be produced, which can be utilized to make protecting paints and also glass. Fiber-reinforced plastic. In addition, phthalic anhydride is additionally widely utilized in layers, medications, chemicals, saccharin as well as various other industries.

Phthalic anhydride is also a widely used acid anhydride epoxy resin healing agent. Affordable price, reduced warmth generation during treating, particularly ideal for large actors products and laminates. The healed item has excellent electric buildings and mechanical strength, excellent chemical resistance (however inadequate antacids resistance), as well as the thermal contortion temperature is 110-147 ° C. The general dosage is 30-50 parts, and also the treating conditions are: 100 ℃/ 2h +150 ℃/ 5h. This product has a high melting point, has sublimation, as well as has a brief service life (3.5 h at 110 ° C).

Phthalic Anhydride Uses

  1. Standard solution of standard alkali to separate primary alcohols from secondary and tertiary alcohols. Distinguish between primary amines and aromatic hydrocarbons according to the melting point of the derivatives. Remove thiophene from benzene.
  2. Phthalic anhydride, abbreviated as phthalic anhydride, is an intermediate of the fungicide sterilant, the pesticide phosphine, and the herbicide bentazone.
  3. Phthalic anhydride is an essential organic chemical resources, generally used in the manufacturing of plastic plasticizers, alkyd materials, dyes, unsaturated resins, and also particular medications and also pesticides.
  4. Phthalic anhydride is one of the most vital organic chemical basic materials. Its major derivatives are dibutyl phthalate, dioctyl as well as diisobutyl phthalate, which are made use of as plasticizers for PVC, etc; Ester resins, alkyd resins, dyes and also pigments, different paints, preservative, laxative phenolphthalein in medicine, phosphine in chemicals, bentazone and sodium saccharin, and so on.
  5. Phthalic anhydride is currently commonly made use of in chemical, pharmaceutical, electronic devices, agriculture, finishings, great chemicals and also various other industrial industries. Phthalic anhydride in my country is primarily used in the manufacturing of phthalate plasticizers. Phthalic anhydride taken in make up about 60% of the overall consumption of phthalic anhydride, dyes and paints make up 25%, and also unsaturated materials and other items make up about 15%.

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Application of Phthalic Anhydride

Phthalic anhydride can go through hydrolysis, alcoholysis and aminolysis reactions, and react with aromatic hydrocarbons to manufacture anthraquinone by-products. Phthalic anhydride is industrially prepared by gas-phase oxidation of naphthalene and air at 350-360 ° C under the catalysis of vanadium pentoxide, and it can likewise be prepared by air oxidation of o-xylene. Phthalic anhydride can be used instead of phthalic acid, and also primarily responds with monohydric alcohols to create esters, such as dibutyl phthalate, dioctyl phthalate.

Preparation of Phthalic Anhydride


  1. Phthalic anhydride – WikiPedia
  2. Zhang Quanying, Ding Min, Wu Fangning, et al. Production and Industrial Status of Phthalic Anhydride[J]. Contemporary Chemical Industry Research, 2005(10):8-11+7.

Phthalic Anhydride Suppliers and Manufacturers

As a phthalic anhydride supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best phthalic anhydride raw materials to customers all over the world.

Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.

If you have a demand for phthalic anhydride and related products, please contact our service staff Zhishang Chemical – White directly, and we will provide you with high-quality products at the best price.

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