What Is Sodium undecylenate?

Learn about the preservative, surfactant cleansing, and surfactant emulsifying characteristics of Sodium undecylenate and its usage in personal care products.

What Is Sodium undecylenate? Brandon Jones / IngredientReviewer

Last Updated: October 2, 2024

Written by Brandon Jones

What Is Sodium undecylenate?

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Sodium undecylenate is a solid ingredient that can be found in cosmetics. It has multiple functions, including being a preservative, which helps to prevent the growth of harmful bacteria and other microorganisms. It also works as a surfactant, which means it helps to cleanse and emulsify (mix together) different ingredients in the cosmetic product. Essentially, it helps to keep your cosmetics safe and effective while also improving their texture and consistency.

What is the purpose of Sodium undecylenate in personal care products? It is used for its preservative, surfactant cleansing, and surfactant emulsifying characteristics. Sodium undecylenate prevents spoiling, helps clean body surfaces, and helps mix liquids that don't usually mix.

Names and identifiers that we found for this substance include: Sodium Undecylenate, Sodium undec-10-enoate, and "10-Undecenoic acid, sodium salt".

What Are Preservative Ingredients?

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Sodium undecylenate has preservative characteristics.

Preservative ingredients are added to cosmetic products to prevent the growth of harmful bacteria, yeast, and mold. These microorganisms can grow in the product over time and cause it to spoil, leading to a potential risk of infection or irritation when applied to the skin.

Preservatives work by inhibiting the growth of microorganisms or killing them, which helps maintain the product's quality and safety and extend its shelf life. Cosmetic products could become contaminated and unsafe to use without preservatives after just a few weeks or months. Each preservative has a specific mode of action and is used at a particular concentration to provide adequate protection against microorganisms while also minimizing the risk of irritation to the skin.

Types of Preservative Ingredients

Here are some of the most common types of preservative ingredients:

  • Antimicrobial agents: These substances inhibit or kill microorganisms, such as bacteria and fungi, which can cause spoilage and contamination in cosmetic products.

  • Chelating agents: These compounds bind to metal ions that promote the growth of microorganisms and accelerate spoilage. By chelating these metal ions, chelating agents can help to stabilize cosmetic formulations.

  • Acidifiers: These substances lower the pH of cosmetic formulations, making them less hospitable to microorganisms.

  • Antioxidants: These compounds help prevent the oxidation of cosmetic ingredients, which can cause them to degrade and spoil.

  • Natural preservatives: These are various natural ingredients, such as essential oils and plant extracts. These have antimicrobial properties and can be used as preservatives in cosmetic formulations.

What Are Surfactant Cleansing Ingredients?

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Sodium undecylenate has surfactant cleansing characteristics.

Surfactant cleansing ingredients are commonly found in various cosmetics, particularly those designed for cleansing, such as shampoo, body wash, and facial cleansers. These ingredients serve several purposes, including wetting body surfaces, emulsifying or dissolving oils, and suspending dirt and grime, making them easier to remove. Surfactants generally contribute to the foaming and lathering properties of cleansing products, making them more effective in removing impurities from the skin or hair.

What Are Surfactant Emulsifying Ingredients?

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Sodium undecylenate has surfactant emulsifying characteristics.

Surfactant emulsifying ingredients helps mix two liquids that do not usually mix well by reducing the surface tension of the ingredients. The emulsification process involves suspending or dispersing one liquid in a second liquid, such as oil in water or vice versa. However, these two liquids have different properties that cause them to repel each other and not mix. This is where surfactants come in, as they can reduce the liquids' surface tension and allow them to mix.

Surfactants have two ends: a hydrophilic (water-loving) head and a hydrophobic (water-repelling) tail. When added to two liquids that do not mix well, the hydrophilic head attaches to the water-based liquid, while the hydrophobic tail attaches to the oil-based liquid. This creates a stable mixture of the two liquids and allows for a smooth and even distribution of ingredients in the cosmetic product.

Safety

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Remember, always read and follow the instructions provided on product labels carefully. If you have any questions or concerns about using a product containing various ingredients, consult with your doctor or healthcare provider before use.