Hydroxylamine-trisulphonic Acid

The potassium salt of this acid is formed by the interaction of potassium hydrogen sulphite and potassium nitrosodisulphonate, according to the equation:

2O:N(SO₃K)₂ + H.SO₃K = OH.N(SO₃K)₂ + KSO₃.O.N(SO₃K)₂.

Potassium hydroxylamine trisulphonate has the constitution (KSO₃)₂:N.O.SO₃K.