10-Pack Unknown Composition Potassium Hydrogen Phthalate Samples, 100g Each, Varying Purities 20-65% Chemical_Malonic Acid 5-inch hollow glass prism with

5-inch hollow glass prism with a stopper

Stores small specimens and reagent aliquots with leak-resistant screw tops

steel nail

Used as a histology contrast stain and a pH indicator covering the 11

Narrow tall-form cylinder used for colorimetric Nessler comparisons against standard solutions

10-Pack Unknown Composition Potassium Hydrogen Phthalate Samples, 100g Each, Varying Purities 20-65% Chemical_Malonic Acid 5-inch hollow glass prism withUsed to challenge students in determining purity by titration of unknowns, this 10 pack of 100g potassium hydrogen phthalate samples ranges 20 65% purity for analytical chemistry practice.