Which item is NOT a factor affecting sanitizer effectiveness?

• A. Concentration
• B. Water Temperature
• C. Container Color
• D. Contact Time

Answer: (C)

Sanitizer effectiveness comes from the chemical doing its job under the right conditions: the solution must be at the proper concentration, used at an appropriate temperature, and given enough contact time to act on the microbes. The color of the container doesn’t change the sanitizer’s chemistry or how long the surface is exposed, so it doesn’t influence the kill power. That’s why container color is not a factor. In contrast, concentration, temperature, and contact time directly affect how well the sanitizer works: too little concentration, too cool, or too short a contact time all reduce effectiveness. Always follow the label for correct concentration and required contact time.