# What is the concentration of concentrated ammonia solution?

Conc. ammonia is $15 \cdot m o l \cdot {L}^{-} 1$.
I think Fisher still sells this as ammonium hydroxide, which is a bit of a misnomer, because the actual reagent is $N {H}_{3} \cdot {H}_{2} O$, an aqueous solution of ammonia. If you get a whiff of these ammonia solutions, it will bring literal tears to your eyes.