Packaging and storage—
Preserve in tight, light-resistant containers.
Clarity and color of solution—
A solution of 2 g in 20 mL of water is clear and colorless.
Identification—
A:
A solution (1 in 50) responds to the tests for
Silver 
191
.
B:
Mix a solution (1 in 10) in a test tube with 1 drop of diphenylamine TS, and then carefully superimpose it upon sulfuric acid: a deep blue color appears at the zone of contact.
Copper—
To 5 mL of a solution (1 in 10) add 6 N ammonium hydroxide, dropwise, until a precipitate first formed is just dissolved: no blue color is produced.
Assay—
Powder about 1 g of Silver Nitrate, and dry in the dark over silica gel for 4 hours. Weigh accurately about 700 mg of this dried salt, dissolve in 50 mL of water, add 2 mL of nitric acid and 2 mL of
ferric ammonium sulfate TS, and titrate with 0.1 N ammonium thiocyanate VS. Each mL of 0.1 N ammonium thiocyanate is equivalent to 16.99 mg of AgNO
3.
