Phthalic anhydride, nke a na-akpọkarị phthalic anhydride, bụ ihe dị mkpa maka kemịkalụ organic. Ọ bụ ihe eji egbochi ọkụ ọkụ maka roba eke, roba isoprene, roba butadiene, roba styrene-butadiene, na roba nitrile, na-egbochi ọkụ ọkụ ma na-eme ka nchekwa ọrụ ka mma. Ọ nwere obere mmetụta na oge vulcanization na ihe ndị na-aka nká nke ngwaahịa emechara. Ọ dị irè karịsịa maka sistemụ Chemicalbook nwere thiazole-guanidine na thiazole-thiuram accelerators, yana ngwakọta nwere ihe na-eme ka alkaline accelerators, mana ọ dabaraghị maka sistemụ vulcanization na-enweghị thiuram. Ọ na-agbasa ngwa ngwa, ọ naghị eto, ọ na-enwekwa obere mmetọ, mana ngwakọta roba ọcha nwere ike igosi obere mgbanwe agba mgbe ekpughere ya na ìhè, ọ naghịkwa adabara maka ojiji na ngwakọta roba ọcha.

Phthalic anhydride bụ anhydride cyclic nke a na-emepụta site na mmiri mmiri nke phthalic acid n'ime molekul. Ọ nwere ike ịgafe hydrolysis, alcoholysis, na ammonolysis, ma na-emeghachi omume na aromatic hydrocarbons iji mepụta anthraquinone derivatives. N'ụlọ ọrụ mmepụta ihe, a na-emepụta phthalic anhydride site na oxidation gas-phase nke naphthalene na ikuku na 350–360 °C n'okpuru vanadium pentoxide catalysis, ma ọ bụ site na oxidation nke o-xylene na ikuku. Enwere ike iji Phthalic anhydride dị ka nnọchi maka phthalic acid, na-emeghachi omume karịsịa na monohydric alcohols iji mepụta esters, dị ka dibutyl phthalate na dioctyl phthalate.

Njirimara kemịkalụ: kristal ọcha dị ka agịga nwere obere isi. Dị nro. A na-agbaze ntakịrị na mmiri ọkụ na ether, a na-agbaze na acetone, ethanol, benzene, na pyridine. A na-agbanwe gaa na phthalic acid mgbe ọ metụrụ mmiri ọkụ ma ọ bụ metụ aka ruo ogologo oge na mmiri. Nchekwa siri ike. A na-ere ọkụ. Ngwakọta uzuzu na ikuku na-akpata ihe egwu mgbawa; obere oke ọkụ (LCL) 12.6 g/cm³. Uzuzu e tinyere na ya na-akpata ihe egwu ọkụ. Okpomọkụ ọkụ nke ikuku 160°C, okpomọkụ ọkụ akpaka 545°C. Nsí; oke ntinye a na-anabata 1 mg/m³.

Phthalic anhydride bụ otu n'ime ihe ndị kacha mkpa e ji emepụta kemịkalụ organic. Ihe ndị bụ isi e ji mee ya gụnyere dibutyl phthalate, dioctyl phthalate, na diisobutyl phthalate, nke a na-eji eme plastik maka PVC, wdg. Enwere ike iji ya mee ihe na mmepụta nke resin polyester na-enweghị afọ ojuju, resin alkyd, agba na agba, agba dị iche iche, ihe mgbakwunye nri, phenolphthalein laxative na ọgwụ, yana ọgwụ nje dịka phosmet, metribuzin, na sodium saccharin.

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