Methanol, Aldehyde-free

Methanol, Aldehyde-free Methanol containing not more than 0.001% of aldehydes and ketones. Dissolve 25 g of iodine in 1000 mL of methanol. Add this solution, with constant stirring, to 400 mL of 1m sodium hydroxide and add 150 mL of water. Allow to stand for 16 hours, filter and boil under a reflux condenser until the odour of iodoform is no longer detectable. Distil the resulting solution by fractional distillation.