Ph of Soap: 5 Factors You Should Know!

What is the pH of Soap?

The pH of soap ranges between 9 and 10.5, making it slightly alkaline. This alkaline nature is important in cleaning because it helps to break down and dissolve dirt and grime.

How can we determine the pH of Soap?

The most accurate way to test the pH of your soap is to use a digital pH meter. These are available at most homebrewing or laboratory supply stores and can provide precise readings.

What are the effects of using high-pH soap?

Using high-pH soap can have a range of effects on the skin, depending on the individual’s skin type and sensitivity. Here are some of the possible effects:

  1. Dryness: High-pH soaps can strip the skin of its natural oils, leaving it feeling dry and tight.
  2. Irritation: For people with sensitive skin, using high-pH soap can cause irritation, redness, and itching.
  3. Inflammation: High-pH soap can disrupt the skin’s natural pH balance, which can lead to inflammation and damage to the skin barrier.
  4. Acne: If you have acne-prone skin, using high-pH soap can make your breakouts worse by disrupting the skin’s natural microbiome.
  5. Ageing: Long-term use of high-pH soap can accelerate the ageing process by damaging the skin’s collagen and elastin fibres, leading to wrinkles and fine lines.

Overall, it’s best to use a pH-neutral soap that is gentle on the skin to maintain a healthy and balanced skin barrier.

Factors affecting the pH of Soap

The pH of soap can be affected by several factors, including the type of soap, the ingredients used to make the soap, and the water used during the manufacturing process.

  1. Type of Soap: The type of soap used can affect the pH. For example, soaps made from natural ingredients such as olive oil and coconut oil tend to have a pH between 8 and 10. On the other hand, synthetic soaps, such as those made from detergents, have a pH between 7 and 8.
  2. Ingredients: The ingredients used to make the soap can also affect the pH. For example, if the soap contains acidic ingredients such as citric acid or lactic acid, the pH will be lower than if the soap contains alkaline ingredients such as sodium hydroxide or potassium hydroxide.
  3. Water: The type of water used during the manufacturing process can also affect the pH of soap. Hard water, which contains a high concentration of minerals, can make the soap more alkaline, while soft water, which has fewer minerals, can make the soap more acidic.

It’s important to note that the pH of soap is also affected by the length of time it has been curing. As soap cures, it becomes more alkaline due to the ongoing saponification process.

Importance of pH of Soap for Skin Care

Soap’s pH level is important for skin care as it can disrupt the natural pH balance of our skin, leaving it vulnerable to irritation, dryness, and other issues. Ideally, soap for skin care should have a pH level close to our skin’s natural pH of around 9 to 10.5.

About the author

I am Leena Raswant, a chemistry postgraduate. I thrive on challenges and continually specified goals. I aim to learn, unlearn, relearn and spread my knowledge in the best possible ways.

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