Biuret Reagent TS, (U.S.P. Test Solution) is a solution, sometimes designated with "TS or Test Solution", that is prepared according to the specifications of the USP Pharmacopeial Convention, for the purpose of conducting USP and National Formulary tests and assays.

The Ricca Chemical 20% w/v ammonium hydroxide is used for the manufacture of organic and inorganic chemicals in laboratories. It can also be used as a cleaning agent in cleaning liquids and as salt in fertilizer.