Ninhydrin

**Definition:** 2,2-Dihydroxy-1H-indene-1,3-(2H)-dione. Reagent toxic to skin and mucus membranes. It is used in chemical assay for peptide bonds, i.e., protein determinations and has radiosensitizing properties.

**Tree numbers:** - D02.455.426.559.847.486.487.500 - D04.615.486.487.500

**Synonyms:** - Indantrione Monohydrate