Precision Labs Potassium Iodide Starch Test Strips, Vial of 100

These test strips detect free iodine, chlorine, and peroxides in solution. Lower levels react with the strips at 5 to 10 ppm. Iodine requires approximately 60 sec to react, and initial reactions show a slight blue color; higher concentrations turn the strip from dark blue to purple. Vial of 100 strips.