Wapakatikati
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1,4-phthalaldehyde
Onjezerani 6.0 g wa sodium sulfide, 2.7 g wa sulfure ufa, 5 g wa sodium hydroxide ndi 60 ml ya madzi mu 250 ml botolo la makosi atatu ndi reflux condenser ndi chipangizo chogwedeza, ndikukweza kutentha kufika 80.℃pansi kusonkhezera.Mafuta a Yellow sulfure amasungunuka, ndipo yankho limakhala lofiira.Pambuyo pa refluxing kwa 1 h, yankho lakuda la sodium polysulfide limapezeka.
