Application Forms colored condensation products (Schiff bases) with pyrroles1 and primary amines.2 Other Notes Analytical reagent for the determination of amino acids and peptides, amines, indoles, hydrazines and hydrogen peroxides; spray reagent for tryptophan3,4; For the determination of tryptophan in proteins5; Used in microbiology as test reagent for the identification of indole-producing microorganisms.; For Kovacs reagent dissolve 10 g 4-dimethylamino-benzaldehyde in 150 mL 1-pentanol and add 50 mL hydrochloric acid conc. |