Phthalic anhydride, oo loo yaqaan phthalic anhydride, waa walax kiimiko dabiici ah oo muhiim ah. Waa wakiil guud oo ka hortagga gubashada oo loogu talagalay caagga dabiiciga ah, caagga isoprene, caagga butadiene, caagga styrene-butadiene, iyo caagga nitrile, taasoo ka hortagta gubashada iyo hagaajinta badbaadada hawlgalka. Waxay leedahay saameyn yar oo ku saabsan waqtiga gubashada iyo sifooyinka gabowga ee badeecada la dhammeeyay. Waxay si gaar ah waxtar ugu leedahay nidaamyada Chemicalbook oo ay ku jiraan dardar-geliyayaasha thiazole-guanidine iyo thiazole-thiuram, iyo sidoo kale isku-dhafka leh dardar-geliyayaasha alkaline, laakiin kuma habboona nidaamyada gubashada ee aan thiuram lahayn. Si fudud ayay u kala firdhisaa, ma ubaxdo, waxayna leedahay wasakh yar, laakiin isku-dhafka caagga cad waxay muujin karaan midab yar marka la soo bandhigo iftiinka, guud ahaanna kuma habboona in loo isticmaalo isku-dhafka caagga cad.

Phthalic anhydride waa anhydride wareeg ah oo ay samaysay fuuq-baxa gudaha molecular ee phthalic acid. Waxay mari kartaa hydrolysis, alcoholization, iyo ammonolysis, waxayna la falgashaa hydrocarbons aromatic si ay u samayso anthraquinone derivatives. Warshadaha ahaan, phthalic anhydride waxaa soo saara oksaydhka marxaladda gaaska ee naphthalene iyadoo hawada ku jirta 350–360 °C iyadoo la adeegsanayo catalysis vanadium pentoxide, ama oksaydhka o-xylene oo leh hawada. Phthalic anhydride waxaa loo isticmaali karaa beddelka phthalic acid, oo inta badan ka falceliya alcohols monohydric si ay u sameeyaan esters, sida dibutyl phthalate iyo dioctyl phthalate.

Sifooyinka Kiimikada: Kilaasooyin cad oo u eg irbad oo leh ur yar. Liin dhanaan. Si yar ugu milma biyaha kulul iyo ether, ku milma acetone, ethanol, benzene, iyo pyridine. Wuxuu isu beddelaa aashitada phthalic marka uu taabto biyo karkaraya ama uu muddo dheer la xiriiro biyaha. Kaydintu waa mid deggan. Gubasho leh. Isku darka hawada ee boodhka leh waxay keenaan khatar qarax; xadka hoose ee gubashada (LCL) 12.6 g/cm³. Boorka la dhigay wuxuu keenaa khatar dab. Heerkulka gubashada hawada waa 160°C, heerkulka dab-shidka otomaatiga ah waa 545°C. Sun; xadka la oggol yahay ee fiirsashada waa 1 mg/m³.

Phthalic anhydride waa mid ka mid ah walxaha ugu muhiimsan ee kiimikada dabiiciga ah. Waxyaabaha ugu muhiimsan ee laga soo saaro waxaa ka mid ah dibutyl phthalate, dioctyl phthalate, iyo diisobutyl phthalate, kuwaas oo loo isticmaalo balaastikada PVC, iwm. Waxa kale oo loo isticmaali karaa soo saarista resins polyester aan dheregsanayn, resins alkyd, midabyo iyo midabyo, rinjiyo kala duwan, waxyaabaha lagu daro cuntada, phenolphthalein caloosha jilcisa ee daawada, iyo sunta cayayaanka sida phosmet, metribuzin, iyo sodium saccharin.

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