Phthalic Anhydride (PA) ndi chinthu chofunikira kwambiri chamankhwala, chomwe chimapangidwa ndi okosijeni wa ortho-xylene kapena naphthalene. Zikuwoneka ngati zolimba za crystalline zolimba ndi fungo lopweteka pang'ono. PA imagwiritsidwa ntchito kwambiri popanga mapulasitiki, unsaturated polyester resins, alkyd resins, utoto, ndi utoto, ndikupangitsa kuti ikhale yapakati pamakampani opanga mankhwala.
Kuti mudziwe zambiri kapena kupempha zitsanzo, chonde lemberani gulu lathu lazamalonda. Tadzipereka kupereka zinthu zapamwamba komanso ntchito yabwino kwambiri!