This is the most widely used formulation of ninhydrin in the world. It has developed prints over two-years old in actual cases and 50-year-old prints in experimental cases. Ninhydrin is packaged in an aerosol can for increased shelf life and convenient field or laboratory use. Available in 6 oz. and 16 oz. sizes. The 201C is supplied in 16oz volume, 11oz net weight (312 grams), 202C is supplied in 6 oz volume and net wt 4 oz (113 g).