On boiling with water, it is converted, first into the disulphonate NH(SO 3 K) 2 thus, N(S03K)3+H20=NH(S03K)2+KHS04, and ultimately into the monosulphonate NH 2 ï¿½S0 3 K.
The disulphonate is more readily obtained by moistening the nitrilosulphonate with dilute sulphuric acid and letting it stand for twenty-four hours, after which it is recrystallized from dilute ammonia.
After standing for twenty-four hours, hydroxylamine potassium disulphonate crystallizes out.
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