Nruab nrab
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1,4-Phthaaldehyde 1
Ntxiv 6.0 g ntawm sodium sulfide, 2.7 g ntawm sulfur hmoov, 5 g ntawm sodium hydroxide thiab 60 ml dej rau hauv 250 ml peb necked hwj nrog reflux condenser thiab nplawm ntaus ntawv, thiab nce qhov kub ntawm 80.℃hauv qab stirring.Yellow sulfur hmoov dissolves, thiab cov tshuaj hloov liab.Tom qab refluxing rau 1 h, tsaus liab sodium polysulfide tov yog tau.
