Zmercaptoethandonic acid (I) containing 54 g.(0.33 equivalent) of solute baeed on acidimetric titration.'A Slight amount of iodine color remained undischarged. The disultonic acid and the hydriodic acid were neutralized with 25.5 g. of sodium hydroxide (0.64 equivalent) in 25 ml. of water. The solution waa then diluted with 380 ml. of methanol and treated with 1200 ml. of acetone. A copioua precipitate waa filtered, washed with acetone, ...
