Ammonium hydroxide (NH4OH) is a common, though not entirely correct name for a solution of ammonia dissolved in water.
when dissolved in water ammonia reacts to a small degree with
water to produce ammonium hydroxide (NH3 + H2O --> NH4OH). But
this only forms in a small amount and most of the ammonia remains
unreacted. This substance cannot be isolated as any attempt to
separate it out will result in it reverting back to ammonia and
its the state that daisy go into after an animal has urinated on it