Which of the following statements about chemical sanitizing is false?

Chemical sanitizers are not effective at any temperature, making the assertion that they are universally effective incorrect. The effectiveness of chemical sanitizers is influenced by temperature, pH levels, and concentration.

In general, many chemical sanitizers perform optimally at specific temperature ranges. For example, certain sanitizers might require warmer temperatures to effectively kill bacteria; however, if the temperature is too low, the sanitizer may not be as effective, leading to inadequate sanitization.

The other statements, when considered, hold true: hot water can enhance the effectiveness of chemical sanitizers when used at temperatures like 160 degrees F or higher; specific contact times are necessary to ensure that microorganisms are effectively killed; and different concentrations of sanitizers can indeed serve various purposes, such as impacting the speed of action or the types of microorganisms targeted. Thus, the focus on temperature dependency in sanitizing processes underscores the inaccuracy of the initial statement about their effectiveness across all temperatures.