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Aluminum Chlorohydrex: An In-Depth Look at Its Role in Cosmetics

Article last updated: June 16, 2024

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Ever wondered what makes your favorite deodorant so effective? Dive into our comprehensive guide on Aluminum Chlorohydrex, exploring its creation, cosmetic benefits, and potential side effects to uncover the science behind this essential ingredient.

What Is Aluminum Chlorohydrex?

Aluminum Chlorohydrex, also known as Aluminum Chlorohydroxy Propylene Glycol Complexes, is a chemical compound commonly used in cosmetic products, particularly in antiperspirants and deodorants. This ingredient is a type of aluminum salt, which is derived from the reaction of aluminum with hydrochloric acid. It is often found in a clear or white powder form and is known for its ability to reduce perspiration and control body odor.

The history of Aluminum Chlorohydrex in cosmetics dates back to the mid-20th century when scientists were exploring more effective ways to combat excessive sweating and body odor. Its introduction revolutionized the antiperspirant industry, providing a more reliable solution compared to earlier formulations. Over the years, it has become a staple in many personal care products due to its efficacy and safety profile.

The production of Aluminum Chlorohydrex involves a chemical synthesis process where aluminum is reacted with hydrochloric acid, followed by the addition of propylene glycol. This results in a complex that combines the astringent properties of aluminum with the moisturizing benefits of propylene glycol. The final product is then purified and standardized to ensure consistency and effectiveness in cosmetic formulations.

The Benefits/Uses of Aluminum Chlorohydrex

In this section, we will delve into the officially recognized cosmetic benefits and uses of Aluminum Chlorohydrex:


One of the primary benefits of Aluminum Chlorohydrex is its function as an antiperspirant. This means it helps to reduce sweating by temporarily blocking the sweat glands. When applied to the skin, especially in areas like the underarms, it forms a gel-like plug in the sweat ducts, which reduces the amount of sweat that reaches the skin’s surface. This can be particularly beneficial for people who experience excessive sweating or hyperhidrosis, helping them stay dry and comfortable throughout the day.


Aluminum Chlorohydrex also acts as an astringent. An astringent is a substance that causes the contraction of body tissues, typically used to reduce bleeding from minor abrasions and to tighten the skin. In the context of cosmetics, this property helps to tighten pores and reduce oiliness, giving the skin a smoother and more refined appearance. This can be especially useful in facial toners and other skincare products aimed at controlling oily skin.


Another significant benefit of Aluminum Chlorohydrex is its deodorant property. This means it helps to control body odor by inhibiting the growth of bacteria that cause unpleasant smells. While it doesn’t stop sweating entirely, it reduces the bacteria that thrive in sweaty environments, thereby minimizing odor. This makes it a common ingredient in deodorants and antiperspirants, helping users feel fresh and confident throughout the day.

Note: the listed benefits above are exclusively based on the officially recognized and defined functions of the ingredient, as documented by the International Nomenclature of Cosmetic Ingredients (INCI).

Potential Side Effects & Other Considerations

Aluminum Chlorohydrex is generally considered safe for topical use in cosmetic products, including antiperspirants and deodorants. However, as with any ingredient, there are potential side effects and considerations to keep in mind.

  • Skin irritation: Some individuals may experience redness, itching, or a burning sensation upon application.
  • Allergic reactions: Although rare, allergic reactions such as hives or swelling can occur.
  • Contact dermatitis: Prolonged use may lead to contact dermatitis in sensitive individuals.

Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Aluminum Chlorohydrex during pregnancy are lacking. Therefore, it is advisable for pregnant or breastfeeding women to consult a healthcare professional for further advice before using products containing this ingredient.

Adverse reactions to Aluminum Chlorohydrex are generally uncommon. However, it is recommended to perform a patch test before widespread usage to ensure there are no adverse reactions.

In terms of comedogenicity, Aluminum Chlorohydrex has a rating of 1 on a scale of 0 to 5, where 0 is totally non-comedogenic and 5 is highly comedogenic. This low rating means it is unlikely to clog pores or cause acne, making it suitable for individuals prone to blemishes or breakouts.

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