What is the typical iodine sanitizer concentration range?

• A. 50–100 ppm
• B. 200–400 ppm
• C. 12.5–25 ppm
• D. 5–10 ppm

Answer: (C)

Iodine sanitizers are effective at relatively low concentrations, which helps minimize residue on food-contact surfaces while still inactivating microorganisms. The typical range is 12.5 to 25 ppm. This concentration balances sanitizing power with practical residue concerns. Higher ranges like 50–100 ppm are standard for chlorine sanitizers, and 200–400 ppm is common for quats, so those options don’t fit iodine. A level of 5–10 ppm is generally not enough to achieve reliable sanitization.