Phthalic anhydride

Phthalic anhydride
About product
  • A raw material used in the plastics industry
  • Production of plasticizers
  • Hardener for synthetic resins, fillers for polymers
  • Application in the production of rubber
  • Production of paints and varnishes
  • Used in organic synthesis for the production of dyes
  • Use as a laboratory reagent

Orders over 500 kg are subject to SENT.

Phthalic anhydride (phthalic acid anhydride) is a raw material with a wide range of applications in organic synthesis. Today it is produced in the process of dehydration, i.e. dehydration of phthalic acid. It comes in the form of flakes, white powder or alloy. In the plastics industry, it is used for the production of plasticizers and softeners. The action of plasticizers reduces the intermolecular interaction, chain friction against each other and increases the mobility of polymer chains. The resulting products are durable and flexible at the same time. One of the important plasticizers obtained from phthalic anhydride are bis(2-ethylhexyl) phthalate, di-isononyl phthalate. Phthalic anhydride is also used in industry for the production of alkyd paints and varnishes, as a component of alkyd resins from which alkyd paints are made. Phthalic paints belong to varnish products that dry as a result of interaction with oxygen. Phthalic paints wet the substrate well, they are coatings with good adhesion, flexibility and high resistance to weather conditions. Phthalic anhydride also used in the production of anthraquinone and its derivatives. Phenolphthalein is formed by the condensation of phenol and phthalic acid. Phthalic anhydride is used in the pharmaceutical industry for the production of drugs. Phthalic acid anhydride is a precursor of reagents helpful in organic synthesis. Used in the production of some dyes, such as Fluorosein. It is a fluorescent green dye from the group of phthalein dyes obtained by condensation of phthalic anhydride with phenol, resoricin.

Order fulfillment time: up to 7 days.

Chemical name

Phthalic acid anhydride


solid, flakes



Main ingredient content

min. 99.7%

Hazard statements

H302 Harmful if swallowed.

H315 Causes skin irritation.

H317 May cause an allergic skin reaction.

H318 Causes serious eye damage.

H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled.

H335 May cause respiratory irritation.

Precautionary statements

P281 Use personal protective equipment as required.

P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.

P304+341 IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.

P305+351+338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P333+313 If skin irritation or rash occurs: Get medical advice/attention. P342+311 If experiencing respiratory symptoms: Call a POISON CENTER or doctor/physician.

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Chemical raw materials and intermediates