The Problem With Quaternary Disinfectants

Disinfecting floors by using quaternary disinfectants (quats) is a common practice, especially in healthcare facilities. This should be a two-step process of cleaning and then disinfecting. However, quats are commonly used in one step, and while they are a disinfectant, they aren’t effective cleaners. In fact, quats are classified as cationic surfactants and are positively charged1, which, when in opposition to a negatively charged floor, can create a molecular attraction.

The positively-charged quat residue is attracted to the negatively charged floor. Since quats have a natural stickiness or tackiness, they attract soils to them.

These two properties-the molecular attraction of the quats to the floor and dirt to quats-creates an environment in which the residue and dirt build-up can become thicker and more layered over time.

This residue can lead to all sorts of problems, including:

• Unappealingly sticky floors
• Floors that look dirty faster 
  
• Slippery floors that can lead to more slip and fall accidents 
  
• The creation of bio-films that can serve as a breeding ground for bacteria