Phthalic anhydride, feem ntau hu ua phthalic anhydride, yog ib yam khoom siv organic tseem ceeb. Nws yog ib yam khoom siv dav dav uas tiv thaiv kev kub hnyiab rau cov roj hmab ntuj, roj hmab isoprene, roj hmab butadiene, roj hmab styrene-butadiene, thiab roj hmab nitrile, tiv thaiv kev kub hnyiab thiab txhim kho kev nyab xeeb hauv kev ua haujlwm. Nws muaj qhov cuam tshuam tsawg kawg nkaus rau lub sijhawm vulcanization thiab cov khoom laus ntawm cov khoom tiav. Nws yog qhov tshwj xeeb tshaj yog rau cov kab ke Chemicalbook uas muaj thiazole-guanidine thiab thiazole-thiuram accelerators, nrog rau cov tshuaj uas muaj alkaline accelerators, tab sis tsis haum rau cov kab ke vulcanization uas tsis muaj thiuram. Nws yooj yim tawg, tsis tawg paj, thiab muaj kuab paug tsawg, tab sis cov roj hmab dawb yuav pom me ntsis discoloration thaum raug lub teeb, thiab feem ntau nws tsis haum rau siv nrog cov roj hmab dawb.

Phthalic anhydride yog ib qho cyclic anhydride tsim los ntawm intramolecular dehydration ntawm phthalic acid. Nws tuaj yeem dhau los ntawm hydrolysis, alcoholysis, thiab ammonolysis, thiab reacts nrog aromatic hydrocarbons los synthesize anthraquinone derivatives. Industrially, phthalic anhydride yog tsim los ntawm cov pa roj oxidation ntawm naphthalene nrog huab cua ntawm 350–360 ° C nyob rau hauv vanadium pentoxide catalysis, lossis los ntawm oxidation ntawm o-xylene nrog huab cua. Phthalic anhydride tuaj yeem siv los ua ib qho hloov rau phthalic acid, feem ntau reacting nrog monohydric alcohols los tsim esters, xws li dibutyl phthalate thiab dioctyl phthalate.

Cov khoom siv tshuaj lom neeg: Cov siv lead ua dawb zoo li koob nrog me ntsis tsw. Sublimes. Me ntsis soluble hauv dej kub thiab ether, soluble hauv acetone, ethanol, benzene, thiab pyridine. Hloov mus rau phthalic acid thaum kov dej npau lossis kov dej ntev. Khaws cia ruaj khov. Flammable. Cov hmoov av sib xyaw ua rau muaj kev phom sij tawg; qhov txwv qis dua ntawm kev kub hnyiab (LCL) 12.6 g / cm³. Cov hmoov av tso tawm ua rau muaj kev phom sij hluav taws. Aerosol kub hnyiab 160 ° C, qhov kub tsis siv neeg 545 ° C. Tshuaj lom; qhov txwv concentration tso cai 1 mg / m³.

Phthalic anhydride yog ib qho tseem ceeb tshaj plaws ntawm cov khoom siv organic chemical raw. Nws cov khoom tseem ceeb suav nrog dibutyl phthalate, dioctyl phthalate, thiab diisobutyl phthalate, uas yog siv los ua cov yas rau PVC, thiab lwm yam. Nws kuj tseem siv tau rau hauv kev tsim cov unsaturated polyester resins, alkyd resins, dyes thiab pigments, ntau yam xim, cov khoom noj khoom haus ntxiv, cov laxative phenolphthalein hauv tshuaj, thiab cov tshuaj tua kab xws li phosmet, metribuzin, thiab sodium saccharin.

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