C2H6AlNO4.xH2O
Aluminum, (glycinato-N,O)dihydroxy-, hydrate.
(Glycinato)dihydroxyaluminum hydrate [41354-48-7].
Anhydrous 135.06 [13682-92-3].
Dihydroxyaluminum Aminoacetate yields not less than 94.0 percent and not more than 102.0 percent of dihydroxyaluminum aminoacetate (C2H6AlNO4), calculated on the dried basis. It may contain small amounts of aluminum oxide and of Aminoacetic Acid.
Identification: Suspend 1 g in 25 mL of water, add hydrochloric acid, dropwise, until a clear solution is formed, and divide it into two equal parts for the following tests.
A: One portion of the solution responds to the tests for Aluminum.
B: To the other portion of the solution add 1 drop of liquefied phenol and 5 mL of sodium hypochlorite: a blue color is produced.
pH: between 6.5 and 7.5, in a suspension of 1 g of it, finely powdered, in 25 mL of water.
Loss on drying: Dry it at 130C to constant weight: it loses not more than 14.5% of its weight.
Mercury: the limit is 1 ppm.
Isopropyl alcohol: Transfer about 5 g to a flask provided with a reflux condenser, and add 100 mL of potassium permanganate solution (1 in 300) and 10 mL of sulfuric acid. Reflux the mixture for 30 minutes, distill, and collect 10 mL of the distillate. To 1 mL of the distillate add 5 drops of sodium nitroferricyanide and 2 mL of 1 N sodium hydroxide, then add a slight excess of 6 N acetic acid: no red color is produced.
Nitrogen: Not less than 9.90% and not more than 10.60% of nitrogen is found.
Assay: not less than 94.0 percent and not more than 102.0 percent of dihydroxyaluminum aminoacetate (C2H6AlNO4), calculated on the dried basis.
