Patent ID: 7524989

Claim:
A stabilized hydroxylamine solution comprising a selected stabilizer selected from the group consisting of (a) 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetic acid, (b) 4,8-dihydroxyquinoline-2-carboxylic acid, (c) 4,7-dihydroxy-1,10-phenanthroline, (d) 2-mercaptonicotinic acid, (e) bis[N,N-bis(carboxymethyl)-aminomethyl]fluorescein, (f) N,N′-bis(2-carboxyethyl)-N,N′-ethylenediglycine trihydrate, (g) cystine, (h) 2,3-dihydroxybenzoic acid, (i) thiosalicylic acid and (j) mixtures of the foregoing.