Lugol’s Iodine Solution – 2.5L (1% Iodine in 2% Potassium Iodide)

Lugol’s Iodine Solution is a widely used aqueous iodine reagent supplied in a generous 2.5‑litre container, making it ideal for repeated use in busy school science laboratories. This classic formulation contains 1% iodine dissolved in 2% potassium iodide, ensuring stability and reliable performance for teaching and demonstration purposes.

Classified as Not Regulated for transport (UN: NR), this solution is straightforward to store and manage within educational environments. While no specific CAS number applies to the solution as a mixture, it is clearly labelled to support safe handling in line with COSHH and school laboratory safety procedures.

Lugol’s Iodine Solution is best known for its distinctive colour change reactions, making it an excellent visual reagent for both chemistry and biology lessons. The large 2.5L volume is particularly suitable for whole‑class practicals and long‑term departmental use.

Key Features

• Lugol’s Iodine Solution
• 2.5L bulk container – ideal for schools
• Formulation: 1% iodine in 2% potassium iodide
• UN Classification: Not Regulated (NR)
• Ready‑to‑use aqueous solution
• Strong colour contrast for clear visual results
• Clearly labelled for safe educational laboratory use

Ideal for School Science Lessons

Lugol’s Iodine Solution is a staple reagent for KS2, KS3, GCSE, and A‑Level science lessons, valued for its immediate and easily observed results. Under appropriate supervision, it is commonly used for:

• Testing for starch in food science and biology experiments
• Demonstrating colour change reactions
• Investigating plant storage tissues such as potatoes
• Supporting lessons on carbohydrates and digestion
• Introducing students to safe handling of chemical indicators

Practical, economical, and highly visual, Lugol’s Iodine Solution helps students quickly grasp key scientific concepts while developing confidence in laboratory techniques. It is an essential resource for any primary or secondary school science department.