Hydroxylamine disulfonate, potassium

The precipitated potassium hydroxylamine disulfonate is expeditely filtered from the cold liquid, and the moist salt is dissolved in 500ml of N/2 hydrochloric acid. The solution is heated on the water bath for two hours and then well cooled in ice while 59g of potassium bicarbonate is added in small portions (foaming ) to the liquid in order to neutralize the free acid formed in the hydrolysis. The final solution should be adjusted to a faint add reaction with... 

The reagent is prepared by oxidizing sodium hydroxylamine disulfonate with permanganate, removing the MnOi by filtration, and salting out with potassium chloride. Teuber and co-workers have studied extensively the oxidation of sub-... 

Preparation. Singhla reports an improved procedure for the preparation based on a patent by H.-J. Teuber. Hydroxylamine disulfonate, HON(SOaNa)2, is prepared from sodium nitrite, sodium bicarbonate, and sulfur dioxide and then oxidized with potassium permanganate with pH-control. Manganese dioxide is removed by centrifugation followed by filtration. Fremy s salt separates from the filtrate after addition of KC1 and is recrystallized from 1 N KOH. Material prepared in this way can be stored in the cold for several months. 

Dissolve 0.5 mole (42.5 grams) of potassium nitrite and 0.6 mole (58 grams) of potassium acetate in 200 ml of water in a 2-liter flask, and cool in an ice-salt freezing mixture to about — 5°. Add 750 grams of finely crushed ice, shaking frequently. (A mechanical stirrer is not satisfactory.) Pass sulfur dioxide slowly. A mass of crystals of potassium hydroxylamine disulfonate, H0 N(S03K)2 2H20, crystallizes out. When the odor of sulfur dioxide shows that an excess has been passed, filter off these crystals under suction and wash them with 100 ml of ice water. The yield is about 85 per cent. 

Hydroxylamine trisulfonates, e.g. (K03S)0N-(S03K)2 are made by the reaction of K2SO3 with potassium nitrosodisulfonate (Fremy s salt). Acidification of the product results in rapid hydrolysis to the 0,A-disulfonate which can be isolated as the exclusive product ... 

Ammonium nonoxynol-4 sulfate Ammonium nonoxynol-6 sulfate Ammonium phosphate Antimony trichloride Butylated PVP Ceteareth-4 Ceteareth-6 Ceteareth-8 Ceteareth-10 Ceteareth-11 Ceteareth-14 Ceteareth-18 Ceteareth-80 Chitosan Chloro-2-hydroxypropyl trimonium chloride Cyanamide-formaldehyde resin Dibehenyidimonium chloride Diethylene glycol Disodium arsenate Hydrogenated tallowalkonium chloride Hydroxylamine sulfate lsodeceth-6 Lauryl hydroxyethyl imidazoline Lysolecithin MEA-dodecylbenzene sulfonate Octoxynol-25 Oleth-18 Oxalic acid dihydrate PCA PEG-80 castor oil PEG lauramine PEG laurate PEG-20 laurate PEG-14 oleate PEG-5 stearate PEG-23 stearate PEG-8 tallate Potassium acid tartrate Sodium arsenate Sodium chromate Sodium dodecyl diphenyloxide disulfonate Sodium methyl oleoyl taurate Sodium methyl tallow taurate Sodium sulfate... 

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