What Is Aluminum monostearate?

Learn about the anticaking, colorant, emulsion stabilizing, and viscosity-controlling characteristics of Aluminum monostearate and its usage in personal care products.

What Is Aluminum monostearate? Brandon Jones / IngredientReviewer

Last Updated: October 2, 2024

Written by Brandon Jones

What Is Aluminum monostearate?

Section Link

Aluminum monostearate is a type of chemical that is commonly used in cosmetics. It helps to prevent clumping, controls the thickness of products, and keeps the color consistent. It comes in a dry powder form and is also known as dihydroxyaluminium. Although it's safe to use, using too much may lead to an accumulation of aluminum in the body. Aluminium monostearate is made by mixing stearic acid with aluminum and can be used to create gels for medicines or add colors to cosmetics.

What is the purpose of Aluminum monostearate in personal care products? It is used for its anticaking, colorant, emulsion stabilizing, and viscosity-controlling characteristics. Aluminum monostearate prevents clumping, provide color or tint, helps mix ingredients and improve shelf life, and adjusts the thickness of a product.

Names and identifiers that we found for this substance include: Aluminum monostearate, Al-St 103, Aluminum Stearate 300, "Octadecanoic acid, aluminum complex", "Aluminum, dihydroxy(octadecanoato-kappaO)-", and Aluminium hydroxide octadecanoate (1/2/1).

What Are Anticaking Ingredients?

Section Link

Aluminum monostearate has anticaking characteristics.

Anticaking ingredients are used in many cosmetic products to prevent the formation of clumps or lumps. They work by absorbing excess moisture and preventing the buildup of static electricity that can cause particles to stick together.

When powders or other dry ingredients are used in cosmetic products, such as face powders, blush, or eyeshadow, they can clump together, making it challenging to apply the product smoothly. Anticaking agents can help prevent this by coating the individual particles and creating a barrier between them. This barrier makes it more difficult for the particles to stick together, resulting in a smoother and more even application.

Types of Anticaking Ingredients

Here are some of the most common types of anticaking ingredients in cosmetics:

  • Minerals and clays: These ingredients absorb excess moisture, thereby preventing clumping. Examples include talc, kaolin clay, and bentonite clay.

  • Silica derivatives: These ingredients have a high surface area, which allows them to absorb moisture and prevent clumping. Examples include silica microspheres, silica gel, and hydrated silica.

  • Polymers: These ingredients work by coating particles and preventing them from sticking together. Examples include polyethylene glycol (PEG), polyvinylpyrrolidone (PVP), and copolymers of vinylpyrrolidone and vinyl acetate.

  • Fatty acids and their salts: These ingredients reduce friction between particles and prevent them from sticking together. Examples include magnesium stearate, calcium stearate, and stearic acid.

  • Zeolites: These ingredients absorb moisture to prevent clumping. Examples include zeolite A and zeolite Y.

  • Starches: These ingredients work by absorbing moisture and preventing clumping. Examples include cornstarch, rice starch, and tapioca starch.

What Are Colorant Ingredients?

Section Link

Aluminum monostearate has colorant characteristics.

Colorant ingredients are used in cosmetic products to give them a specific color or tint. They can be derived from natural sources such as plants or synthetic sources and come in various forms such as powders, liquids, and pastes. These ingredients are added to change the natural color of the product to a desired shade.

Colorants can be added to various other products, including food. In food products, colorants enhance their appearance and make foods look more appealing. For example, a bright red colorant may be added to strawberry-flavored yogurt to make it look like fresh strawberries.

What Are Emulsion Stabilizing Ingredients?

Section Link

Aluminum monostearate has emulsion stabilizing characteristics.

Emulsion stabilizing ingredients help to mix two or more ingredients that generally don't mix well, such as oil and water, to create a stable mixture. They work by coating the oil droplets in the mixture, preventing them from sticking together and separating over time.

Emulsion stabilizing ingredients make the product last longer and more effectively and ensure it doesn't look strange or separate on the shelf. By helping emulsify, these ingredients help make the product more effective and stable over time.

What Are Viscosity-Controlling Ingredients?

Section Link

Aluminum monostearate has viscosity-controlling characteristics.

Viscosity-controlling ingredients increase or decrease the thickness of a product. These ingredients are essential in creating the desired texture and consistency for cosmetic products such as lotions, creams, and serums.

Increasing the viscosity of a cosmetic product can provide a thicker and more substantial texture, making it easier to apply and providing better coverage. On the other hand, decreasing the viscosity can create a lighter, more fluid consistency, allowing for quicker absorption into the skin.

Safety

Section Link

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.