In a beaker with stirring dissolve 10 g of potassium iodide, 5 g of sodium bicarbonate in 200 mL of water thereafter add 8.2 g of ethylvanillin, over the course of 30 minutes add 12. g of iodine granules with stirring. Stir for further 3h and let the solution stand for 12h thereafter filter, wash with dilute and cold potassium metabisulfite solution and dry in air. Recrystallize from hot ethanol.
The combined chemicals
Addition of the iodine
The mixture after standing for 12h, the mixture is now subject to filtration and washing
The crude product dissolving in ethanol
The product crystallizing
The recrystallized product