Acetone cyanohydrin is highly toxic and must be handled in a well-ventilated fume hood. The aqueous waste solutions should not be in contact with acids and, where permitted, must be treated with excess commercial Clorox (R) bleach. All glassware and apparatus that comes into contact with it must be washed with commercial Clorox (R) bleach. All spills around balances or work areas should be immediately cleaned up and the area washed down with bleach.