Quat sanitizer is a food-service sanitizer based on quaternary ammonium compounds (quats). It is used on properly cleaned food-contact surfaces and utensils to reduce microorganisms to the level required by the applicable food-safety standard. Quat sanitizers are common in restaurants because many formulations are suitable for wiping cloths, food-contact surfaces and certain equipment when used according to the product label.
Quaternary ammonium compounds disrupt microbial cell membranes and are effective against a range of bacteria and some other microorganisms. Their performance depends on the formulation, concentration, contact time, temperature, water conditions and the presence of organic soil.
Incorrect dilution, incompatible cleaning chemicals, hard water, organic soil and insufficient contact time can reduce effectiveness. Some quat products are not suitable for every surface or application, so always follow the label and equipment instructions.
Quat and chlorine are different sanitizer chemistries. They have different effective concentration ranges, contact times, compatibility requirements and responses to water conditions. Never use the test strips or dilution instructions for one chemistry to measure another.
Chef’s tip: Keep the sanitizer’s label and matching test strips at the station. Never guess concentration from smell or appearance, and never mix quat sanitizer with other chemicals.
Key distinction: Quat is a chemical sanitizer, not a detergent. It reduces microorganisms after the surface has been properly cleaned.
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