Ninhydrin is most commonly used to detect fingerprints, as the terminal amines of lysine residues in peptides and proteins sloughed off in fingerprints react with ninhydrin.

Inhalation May be harmful if inhaled. Causes respiratory tract irritation. Skin Harmful if absorbed through skin. Causes skin irritation.

The marker for a positive ninhydrin test is a deep blue colouration obtained in the solution. This reaction indicates the presence of amino acids, other amines and ammonia in the test sample.

NINHYDRIN AR