Iodine Solution, 100mL - Reagent-Grade - The Curated Chemical Collection

This 100mL plastic bottle contains reagent grade iodine solution at 1.9% concentration. Iodine solution is the standard indicator for starch, turning from amber to a deep blue-black on contact. The color change occurs because iodine molecules slot into the helical structure of amylose. The solution identifies starch in food samples, tracks starch production in photosynthesis work using leaf discs, indicates amylase activity when starch is broken down and the blue color fails to develop, and traces diffusion across membranes in osmosis demonstrations. Reagent grade indicates a purity suited to analytical work. The test requires only drops, so a 100mL bottle serves as a working bench supply. Iodine stains skin and fabric, and gloves and a covered surface are recommended. Product instructions and safe handling and storage information are printed directly on the bottle, and a Safety Data Sheet is available on request. The chemical is manufactured in the United States and intended for laboratory use only, not for drug, food, or household use. It should be kept out of reach of children.