Cleaning pH: Acidic, Neutral and Alkaline Cleaners
For Cleaning pH, start with the surface, the type of dirt, and the safety checks. Cleaning pH explains why one cleaner removes limescale while another cuts grease. The pH scale runs from acidic to alkaline, and choosing the wrong side of the scale can damage sensitive materials such as marble.
The practical meaning of pH
A pH below 7 is acidic, 7 is neutral, and above 7 is alkaline. Each whole number is a tenfold change, so small-looking pH differences can be chemically significant.
For home cleaning, pH helps explain product fit: acidic cleaners tend to help with mineral deposits, while alkaline cleaners tend to help with oily or greasy soil.
Why pH is not the only factor
Surfactants, solvents, abrasives, dwell time, agitation, temperature, and surface porosity also matter. A neutral cleaner can still be unsuitable for a material if it contains the wrong solvent or leaves residue.
Material compatibility
- Acid-sensitive materials include marble and some natural stones.
- Strong alkaline cleaners can dull or damage some coatings, aluminium, and delicate finishes.
- Always check the label and surface manufacturer guidance before using a new cleaner.