Packaging and storage
Preserve in tight containers at a temperature that is 5
or more below the melting range stated in the labeling.
Labeling
The labeling includes the nominal melting temperature, which is between 27
and 44
.
Alkaline impurities
Dissolve 2.0 g in a mixture of 1.5 mL of alcohol and 3.0 mL of ether. Add 0.05 mL of
bromophenol blue TS, and titrate with 0.01 N hydrochloric acid to a yellow endpoint: not more than 0.15 mL of 0.01 N hydrochloric acid is required.