B:
Dissolve about 300 mg in 5 mL of water, add 4 mL of 6 N ammonium hydroxide, and extract with 50 mL of chloroform. Filter the extract, and evaporate the filtrate on a steam bath with the aid of a current of air. Dissolve about 100 mg of the prilocaine so obtained in 1 mL of alcohol, add 10 drops of
cobaltous chloride TS, and shake for 2 minutes: a bright green color develops, and a precipitate is formed.
C:
Dissolve about 100 mg in 3 mL of water, render the solution alkaline with 6 N ammonium hydroxide, and filter: the filtrate responds to the tests for
Chloride 
191
.
;)
for 4 hours: it loses not more than 0.3% of its weight.