Hydroxylammonium arsenate phosphate

NH30H]2C204 Hydroxylammonium oxalate, 3 83 [NIIjOHJsAsOa Hydroxylammonium arsenate, 3 83 [NH30H]3P04 Hydroxylammonium phosphate, 3 82 NH4N3 Ammonium azide, 2 136, 137... 

The conditions for preparation of the arsenate are similar to those specified for the phosphate, except that a solution of 312 g. (1 mol) of disodium hydrogen arsenate 7-hydrate in 300 ml. of water (heated to 50° to effect solution) is substituted for the phosphoric acid. Hydroxylammonium arsenate may begin to crystallize before all of the arsenate has been added. An uncooled solution of 40 g. of sodium hydroxide (1 mol) in 100 ml. of water is added to effect neutralization. Three 150-ml. portions of water are used to wash the crude product. The yield is 200 to 210 g. of a product whose purity is approximately 95 per cent based on the hydroxylamine content. Purification can be effected by recrystallization of the arsenate from eight times its weight of water. Recovery amounts to about 145 g. (approximately 60 per cent) of a product with a purity of 98 per cent or better. 

Hydroxylammonium salts are reagents usually employed as sources of hydroxylamine for various inorganic and organic reactions. The chloride and sulfate are the better known commercially available salts obtained by the hydrolysis of the nitroparaffins. The phosphate, " arsenate, ... 

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