Lot No.:___________________________???????? ??????Date Received:___________
White powder, or hard, white or translucent masses, having
a strong odour of ammonia. Its solutions are alkaline to litmus.
Freely soluble in water, but is decomposed by hot water.
When heated, it is volatilized without charring, and the
vapour is alkaline to moistened litmus paper. A solution (1 in 20) effervesces
Residue on ignition <281>
Not more than 0.1%
A 2.0g portion shows no more chloride than corresponds to
0.10 mL of 0.020 N hydrochloric acid (0.0035%).
A 2.0 g portion shows no more sulfate than corresponds to
0.10 mL of 0.020 N sulfuric acid (0.005%).
Method I <231>
Reduce to a coarse powder and volatilize 2 g of it on a
steam bath. Add to the residue 1 mL of 3 N hydrochloric acid, and evaporate to
dryness. Dissolve the residue in 2 mL of 1 N acetic acid, and add water to
make 25 mL: the limit is 0.001%.
Place in a weighing bottle about 10 mL of water, tare the
bottle and its contents, add about 2 g of Ammonium Carbonate, and weigh
accurately. Transfer the contents of the bottle to a 250 mL flask, add 50.0
mL of 1 N sulfuric acid VS, and, when solution has been effected, add methyl
orange TS, and titrate the excess acid with 1 N sodium hydroxide VS. Perform
a blank determination <541>. Each mL of 1 N sulfuric acid is equivalent
to 17.03 mg of NH3.
Revised: March, 2005 by lo?????????????????????Approved
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