The optimal pH level of a hypochlorous acid spray is within 4 and 6.5, with products aimed at skin care generally having a pH level ranging from 4.5 to 6. This is due to the fact that this pH level ensures that the highest concentration of hypochlorous acid, or HOCl, is used, without compromising either the stability of the mixture or its compatibility with the skin. While the pH level may change based on how the product is meant to be used, a well-formulated hypochlorous acid spray should have a slightly acidic pH similar to that of the skin itself.
What Does pH Mean?
pH is a measurement that tells us how acidic or alkaline a substance is.
The pH scale runs from 0 to 14:
- A pH below 7 is acidic
- A pH of 7 is neutral
- A pH above 7 is alkaline
Many skincare products are formulated to be slightly acidic because healthy skin naturally has a slightly acidic surface.
While most people focus on ingredients when shopping for skincare, pH is often one of the factors that determines how well those ingredients perform.
Why Does pH Matter for Hypochlorous Acid?
Find out what hypochlorous acid is here.
Under different pH conditions, hypochlorous acid has a different chemical form in solution, which changes as pH increases, and may become less favorable for use in skincare products.
It is due to this reason that pH plays a very significant role in the formulation process, and good hypochlorous acid sprays should have been designed in a way to keep hypochlorous acid in its most effective form.
This is why pH receives considerable attention from reputable manufacturers compared to concentration alone.
What Is the Natural pH of Skin?
Normal skin inherently possesses an outer, protective layer, referred to as the "acid mantle," which is slightly acidic in nature. According to the National Eczema Association, healthy skin is naturally slightly acidic. Maintaining this acidity helps support the skin's natural defenses and contributes to overall skin health.
Having slightly acidic skin offers various advantages, including:
- Skin barrier support
- Moisture regulation
- Prevention of skin irritation
- Maintenance of healthy skin
Products used on the skin tend to be better received by the skin if they are close to the same pH as the skin.
This is why many hypochlorous acid sprays have been developed using the same pH level range.
Why Most Hypochlorous Acid Sprays Are Slightly Acidic
Most hypochlorous acid sprays made for skincare purposes are generally made to be slightly acidic on purpose.
There are many reasons for this:
1. Improved Skin Tolerance
Formulations which are close to skin pH tend to be more tolerable and less likely to disrupt skin integrity.
For example, such products will suit people having:
- Sensitive skin
- Acne-prone skin
- Rosacea-prone skin
- Dry skin
Since hypochlorous acid sprays are often used for soothing irritated skin, it is essential to ensure a favorable skin pH in them.
2. Improved Stability
Hypochlorous acid can be rather difficult to formulate as it should stay stable during the product's shelf-life period.
By controlling pH level, manufacturers may make sure their formulations have sufficient stability.
3. Ensured Efficiency
A stable and appropriate pH can help ensure the required functionality of the product as well as comfort of use.
It is not enough that a skincare product works properly; it should also be tolerable and convenient enough.
What Happens if the pH Is Too High?
If a skincare product gets too alkaline, then it might not react with your skin as smoothly as planned.
Skin barriers are key to keeping skin moisturized and free of inflammation and sensitivities.
Some products can have high alkalinity compared to the skin's natural level of pH, resulting in:
- Dryness
- Tightness
- Irritation
- Discomfort
This does not automatically make a product hazardous, but it just means that a product could require further adjustments.
It is due to this that hypochlorous acid sprays are usually manufactured at optimal levels to work together with the skin's protective barrier.
Can the pH Be Too Low?
Yes.
Some people assume that lower pH automatically means a better product, but skincare formulation is rarely that simple.
Extremely acidic products may increase the likelihood of:
- Stinging
- Sensitivity
- Discomfort
- Skin irritation
The goal isn't to make the product as acidic as possible.
Instead, formulators look for a balance that supports both effectiveness and skin comfort.
This is why many high-quality hypochlorous acid sprays stay within a moderate range rather than pushing to either extreme.
Does a Lower pH Mean a Better Hypochlorous Acid Spray?
Not necessarily.
While pH is important, it's only one factor that contributes to product quality.
Other important considerations include:
- Manufacturing quality
- Product stability
- Ingredient purity
- Packaging
- Storage conditions
- Testing procedures
Two products could have similar pH values but perform very differently depending on how they're formulated.
That's why it's generally better to look at the overall quality and reputation of a product rather than focusing on a single number.
Why Sensitive Skin Users Often Care About pH
Individuals with sensitive skin have a higher tendency to be more mindful about pH levels, since they tend to be more prone to react adversely to any product that could negatively impact the skin barrier.
As explained by Cleveland Clinic, one of the reasons hypochlorous acid has become more popular is due to its ability to promote healthy skin without being harsh on most skin types.
This, alongside a pH level suitable for the skin, makes hypochlorous acid sprays preferred among people with:
- Sensitive skin
- Acne-prone skin
- Redness-prone skin
- Skin barrier damage
The refreshing and lightweight nature of hypochlorous acid sprays is an added advantage for many people.
Should You Look for the pH Before Buying?
If a brand provides pH information, it can certainly be helpful.
However, pH is only one factor to consider when choosing a hypochlorous acid spray.
It's also worth looking at:
- Ingredient transparency
- Product testing
- Brand reputation
- Intended use
- Overall formulation quality
A trustworthy skincare brand should already be formulating its product with skin compatibility in mind.
FAQ
What is the ideal pH for a hypochlorous acid spray?
Most skincare-focused hypochlorous acid sprays are formulated within a mildly acidic range that aligns closely with the skin's natural pH.
Why does pH matter in skincare?
pH can affect skin comfort, barrier function, and how well products interact with the skin.
Is a lower pH always better?
No. Extremely acidic products may increase irritation and aren't necessarily more effective.
What is the natural pH of skin?
Healthy skin is naturally slightly acidic, which helps support the skin barrier and overall skin health.
Can pH affect sensitive skin?
Yes. Products that significantly disrupt the skin's natural pH may contribute to irritation or dryness in some individuals.
Disclaimer
This article is for informational purposes only and is not medical advice. Always consult a dermatologist or healthcare professional regarding skincare concerns or product recommendations.
APA References
Cleveland Clinic. (2024). What is hypochlorous acid? And why should you use it? Cleveland Clinic. https://health.clevelandclinic.org/hypochlorous-acid-skin-care
National Eczema Association. (2023). What is skin pH? National Eczema Association. https://nationaleczema.org/blog/podcast-skin-ph/
National Eczema Association. (2023). What is my skin barrier? National Eczema Association. https://nationaleczema.org/blog/what-is-my-skin-barrier/
National Eczema Association. (2022). Hard water and eczema: What's the connection? National Eczema Association. https://nationaleczema.org/blog/hard-water-eczema/
If you’re looking for a hypochlorous acid spray, you can learn more about our formulation here.
It’s also available through select retailers, including Amazon.
More places to buy can be found here, as well.
Written by
Honeydew Labs Team
