Why is pH so important in selecting cleaning products?

The pH Scale is a means of measuring the degree of acidity or alkalinity of a cleaning agent or solution, simple, easy-to-understand, numeric terms. The scale itself has a range of 0-14,with 0 being the most acidic and 14 being the most alkaline. The mid-point on the scale is 7 and is classed as neutral and this corresponds with the pH measurement for distilled water.

In general terms acidic products (less than pH 7) have descaling properties. Alkaline products (greater than pH 7) have degreasing properties.

 

 

 

Acidic Products

When a pH value of a product or solution decreases below 7, its acidity will start to increase. Most acid based cleaning materials will have a typical pH value of between 0.5 and 5 on the scale. Concentrated pure acids will have a pH value of approximately 0.1, though these would never be used as cleaning as cleaning agents.

 

 

Acidic products are most commonly used to remove limescale deposits from hard surfaces as they will dissolve salts that are not soluble in water.

 

 

 

Alkaline Products

As you can see from the chart, if the pH value rises above 7, the product or solution will become more alkaline. Alkaline products are particularly effective in removing greasy and fatty deposits from hard surfaces. They will typically have a pH value of between 11 and 12.5. Stronger alkaline products such as emulsion floor polish strippers will have a value of around 13. Caustic soda, which is extremely corrosive, will have a pH value of 14.

 

Neutral Products

As we have pointed out earlier, the pH of distilled water is 7 which is taken as being the purest neutral solution. However, in reality, any product or solution with a pH value of between 6 and 9 is generally considered to be neutral. Neutral products are commonly used for general cleaning procedures and include floor cleaners and carpet cleaning solution.

Understanding the relevance of the pH scale when carrying out cleaning tasks is important

 

 

 

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