Ọkara
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1,4- Phthalaldehyde
Tinye 6.0 g nke sodium sulfide, 2.7 g sọlfọ ntụ ntụ, 5 g sodium hydroxide na 60 ml mmiri n'ime 250 ml atọ flask olu ya na reflux condenser na ngwaọrụ mkpali, wee bulie okpomọkụ ruo 80.℃n'okpuru edemede.Uzuzu sọlfọ na-acha odo odo na-agbaze, ihe ngwọta ahụ wee ghọọ uhie.Mgbe refluxing maka 1 h, a na-enweta ngwọta sodium polysulfide na-acha uhie uhie.
