Iodoform test INDEX

Alcohol and acetone may be detected by their low boiling-point and by the iodoform test. Oils containing alcohol form milky mixtures with water. It may be extracted by washing with water, when the refractive index of the washed oil is found to be distinctly higher than that of the original oil. 

Alcohol can be detected h,v dislilJicig a few c.c. of Ihc sample with water, aud testing the distillate by the usual iodoform reaction. It the sample bo wHshed with warm waler in a separator, and the retractivu index of the washed otto l>c examined, it will be found to he higher than that ol the original otto. II this exoes.s be more (ban fl-Ofll i is almost certainly due to alcohol. 

D) Reduction of Iodoform to Methylene Iodide. To 1 g of iodoform add 5 ml of sodium arsenite solution (made by dissolving 2.5 g of arsenic oxide and 5.5 ml of sodium hydroxide in 25 ml of water). The test tube is warmed for 5 minutes at 60-65° in a water bath and the mixture diluted with water. The oily drops which separate are methylene iodide. Look up the density and refractive index of the iodide. 

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