Octadecenedioic Acid: What Is It, Cosmetic Uses & Side Effects

Priya Singh
Fact-Checker: Priya Singh
This article was last updated on: October 11, 2023
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Navigating the cosmetics world can feel like stepping into a chemistry lab. It has complex scientific names that could perplex even the most dedicated beauty enthusiasts. The labels on our favorite products can seem like a cryptic code, and deciphering them can often feel daunting.

One such ingredient that you may have stumbled upon is Octadecenedioic Acid. Despite its somewhat intimidating name (it certainly doesn’t roll off the tongue), this compound is more common in our skincare routines than we may realize.

In this article, we will dive deep into the world of Octadecenedioic Acid. We will unravel its complexities, explore its use in cosmetic products, and shed light on its potential benefits and side effects.

What is Octadecenedioic Acid?

Octadecenedioic Acid, or 9-Octadecenedioic acid as it’s also known, is a type of di-carboxylic acid.

In cosmetics, it’s primarily used as a surfactant and emulsifying agent. Essentially, it improves the texture and stability of a product, helping it maintain a smooth consistency and preventing the individual components from separating.

This isn’t an ingredient you’ll find in a stand-alone product – it’s what we’d call a “non-active” (i.e. it doesn’t directly benefit the skin, and is used for other purposes).

Who Can Use Octadecenedioic Acid?

Octadecenedioic Acid is a versatile ingredient that’s suitable for all skin types. This compound is suitable for topical application even if your skin is oily, dry, or combination.

For those embracing a vegan or vegetarian lifestyle, rest assured that this ingredient is suitable for you. Octadecenedioic Acid is derived from oleic acid, an omega-9 monounsaturated fat primarily extracted from plant sources like olives and nuts.

As for its safety during pregnancy and breastfeeding, consulting with a healthcare professional is always advisable; there isn’t enough research on this particular topic to give you a definitive answer on whether usage during these sensitive times is 100% safe or not.

Remember that every individual can react differently, and what works for one may not work for another.

Octadecenedioic Acid’s Cosmetic Uses

Octadecenedioic Acid serves multiple roles in cosmetic formulations; here are the key benefits:

  • Stability Enhancer: As a surfactant and emulsifying agent, Octadecenedioic Acid is responsible for maintaining a product’s uniform distribution of ingredients. This means it bridges water- and oil-based components, preventing them from separating. This stabilizing effect ensures that the final product retains its consistency and effectiveness, whether applied immediately after opening or after several months of use.
  • Texture Improver: One of the significant roles of Octadecenedioic Acid is improving the texture of cosmetic products. With its surfactant properties, this ingredient ensures your skincare or makeup product has a smooth and creamy consistency. This, in turn, impacts the overall user experience, making the products easier to apply and absorb, thus enhancing their efficacy.
  • Performance Booster: Octadecenedioic Acid also aids in enhancing the overall performance of cosmetic formulations. Keeping the components well-mixed ensures that active ingredients are evenly distributed. This balance allows for equal exposure to these ingredients throughout the product’s lifespan, enhancing their effectiveness on the skin.

In essence, Octadecenedioic Acid plays an indispensable role in formulating a wide range of cosmetics by maintaining their stability, improving texture, and boosting the product’s overall performance.

Octadecenedioic Acid Potential Side Effects

It’s important to understand that side effects and reactions to cosmetic ingredients like Octadecenedioic Acid can vary significantly from person to person. This is primarily due to our unique skin types and individual sensitivities. How our skin reacts to a particular ingredient is dictated by our skin’s properties, such as oiliness, sensitivity, dryness, and combination types. If you’re unsure about your skin type, consider checking out this guide to determine what you may be working with.

With regards to Octadecenedioic Acid, while it’s generally viewed as safe, there can be potential side effects:

  • Skin Irritation: Like any other ingredient, Octadecenedioic Acid might cause skin irritation to those with hypersensitive skin. This could manifest as redness, itchiness, or a burning sensation.
  • Allergic Reaction: In sporadic cases, individuals might experience an allergic reaction characterized by hives or skin swelling.

If you encounter any of these side effects while using a product containing Octadecenedioic Acid, it’s crucial to discontinue use immediately and consult with a healthcare professional or dermatologist for further guidance.

It’s worth noting that adverse reactions to Octadecenedioic Acid are generally rare. In its typical concentration levels within cosmetic products, it is generally regarded as safe and effective.

That said, before incorporating any new product into your skincare regimen, conducting a patch test is always advisable. This precaution can help identify potential adverse reactions before you apply the product to larger and potentially more sensitive areas of skin. Here’s an in-depth patch testing guide to ensure you do it correctly.

Comedogenic Rating

Regarding Octadecenedioic Acid’s comedogenic rating, it falls at a reassuring 0/5. This means it’s non-comedogenic or, in simpler terms, unlikely to clog your pores.

This rating is due to its molecular structure. This is attributed to its low likelihood of causing blockages within your pores. Therefore, Octadecenedioic Acid is deemed suitable, even for those prone to acne or frequent breakouts.

Conclusion

Not all personal care products’ ingredients, particularly skincare, are designed to deliver immediate or noticeable effects. Some support the overall formulation, ensuring that the star players can perform their best. Octadecenedioic Acid is one of these supporting acts; it’s a non-active ingredient that enhances the consistency, stability, and performance of a product, allowing the active elements to shine.

Despite its benefits to a formulation, Octadecenedioic Acid isn’t as widely recognized or popular as some of its cosmetic counterparts. Its relative obscurity may be due to its technical name and the fact that it’s often overshadowed by active ingredients.

As for any concerns around this ingredient, most are likely linked to its imposing name or unfamiliarity. However, rest assured that Octadecenedioic Acid is a safe and beneficial component of your cosmetic products. It is generally well-tolerated and non-comedogenic and is crucial in enhancing a skincare product’s usability.

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