Does anyone have know how to make an acetonitrile solution of Iodine?

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Lucas Veillon

Have you tried sodium iodide? 24.9g NaI/100 g of acetonitrile solvent at 25 °C, per Wikipedia (https://en.wikipedia.org/wiki/Sodium_iodide#Solubility_data)

Salvatore Chiavarini

Iodine is readily soluble in most organic solvents, including acetonitrile. Simply add I2 crystals to ACN....

The exact concentration should be determined by I2 titration, though.