a water solution of ammonia
"The cleaning lady spilled some ammonia down the sink while trying to scrub the grout stains off the bathroom floor."
a pungent gas compounded of nitrogen and hydrogen (NH3)
"The leaky pipe released a sharp, choking cloud of ammonia that made everyone outside cough immediately."
A gaseous compound of hydrogen and nitrogen, NH₃, with a pungent smell and taste.
"The strong, pungent odor of ammonia filled the room as someone cleaned the floor with industrial strength glass cleaner."