The impact of cleaning agents’ pH on cleaning effectiveness
pH is a measure of a substance’s acidity or alkalinity—the scale ranges from 0 to 14, where 7 indicates a neutral pH. Cleaning products, depending on their pH, have different applications and effectiveness against specific types of dirt. Understanding this relationship allows you not only to clean but also to protect surfaces from damage. In professional cleaning settings—such as medical, food service, or industrial facilities—the right choice of cleaning product can impact safety, hygiene, and the durability of materials. In this article, you’ll find practical information to help you better understand why it’s important to pay attention to the pH of cleaning products.
Types of dirt and the effectiveness of cleaning products
Not all types of dirt react the same way to cleaning products—their effectiveness depends largely on the type of dirt and the chemical pH of the product. Different types of dirt have different structures and properties, so properly selected products are needed to remove them. Some substances work better on mineral deposits, while others are effective against grease or organic stains. That is why the pH of a cleaning product is one of the key factors to consider when choosing a product.
Selecting a cleaning agent based on the type of surface
Not every surface can tolerate extreme pH values. When analyzing material tolerance on the pH scale, three groups can be distinguished:
- Resistant materials (e.g., concrete, porcelain tile, clinker) – tolerate both acidic and alkaline conditions well (pH 2–13).
- Moderately sensitive materials (e.g., PVC, linoleum, aluminum) – prefer a pH range of 6–11.
- Sensitive materials (e.g., marble, wood, enamel)—these are best cleaned with neutral cleaners (pH 6–8), as both acids and bases can cause permanent damage.
Using an inappropriate cleaner risks permanently damaging the surface.
How to choose the right pH for the application?
In everyday practice, it is helpful to follow a simple guideline that takes into account both the nature of the dirt and the type of surface being cleaned.
- Acidic cleaning agents (pH < 7) work by reacting chemically with mineral deposits, which are alkaline in nature. When an acidic cleaner comes into contact with such deposits, a neutralization reaction occurs—calcium, magnesium, or iron compounds are dissolved and can be easily removed from the surface. As a result, acidic cleaners are designed to remove limescale, rust, and other inorganic deposits. Their action is based on a strong chemical reaction, so they should be used with caution, especially on materials sensitive to low pH.
- Alkaline cleaning agents (pH > 7) break down fat molecules and other organic substances thanks to their alkali content, which reacts with fats through a process of emulsification. As a result of this reaction, the fat disperses in water and no longer adheres to the surface. Additionally, alkalis can break down proteins and neutralize certain organic compounds, making them useful for removing kitchen, biological, or cosmetic stains. Alkaline cleaners often also have degreasing and penetrating properties, allowing them to thoroughly clean even hard-to-reach areas.
- Neutral cleaning agents (pH ≈ 7) are gentler and do not cause strong chemical reactions. Their action is primarily physical—dissolving dirt with water, aided by mild surfactants. They do not aggressively interfere with the structure of the material or the dirt, making them safe for delicate surfaces and for daily, routine cleaning. Although they are not suitable for tackling tough stains or heavy grease, they work perfectly where the priority is to protect the surface and keep it clean on a daily basis.
pH of cleaning products using Medisept professional products as an example
Medisept cleaning products are developed based on advanced laboratory research and testing conducted at the company’s modern Research and Development Center. The result of this work is a comprehensive range of products with varying pH levels—from acidic (e.g., Mediclean 160 Gres, Mediclean 550 Dishes, Mediclean 580 Lime), through alkaline (e.g., Mediclean 520 Sanit Cream, Mediclean 121 Striper, Mediclean 200 Indust), to neutral (e.g., Mediclean 110 Floor, Mediclean 570 All). Acidic formulations dissolve mineral deposits such as limescale and rust, which is why they are recommended for cleaning sanitary surfaces. Alkaline cleaners emulsify fats and break down organic compounds, making them ideal for kitchens and food processing areas. Neutral cleaners, thanks to their mild formula, are suitable for daily cleaning of sensitive surfaces, including wood, laminates, and resilient flooring.
The pH value is indicated directly on the label, making it easy to select the right cleaner for the type of dirt and material. This comprehensive range allows for thorough cleaning in various work environments.
