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 ammonium hydroxide with a composition of 95.75% water and 4.25% ammonium hydroxide, is commonly used as a detergent, stain remover, bleaching agent. This chemical is best suited for qualitative inorganic analysis. It can be stored at a temperature of 15 to 30 degree C.