Usage and Limitations of Aluminium Hydroxide (Product ID 133613) in Cosmetics
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เมื่อ: December 04, 2025
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คำถาม
We are inquiring about the use of Aluminium hydroxide (Product ID #133613, INCI: Aluminum Hydroxide) in cosmetic formulations. Please clarify the following:
- Can this ingredient be used in cosmetics?
- What are its primary functions (e.g., Opacifying Agent, Bulking Agent, Absorbent, Pigment Coating) and how should it be incorporated into the formula (e.g., oil phase, powder blend)?
- Are there any specific restrictions or limitations regarding its concentration, safety status, or stability (e.g., pH sensitivity, use in aerosol products)?
คำตอบ
Yes, Aluminium hydroxide (Product ID 133613, INCI name: Aluminum Hydroxide) can be used in cosmetic formulations.
How it is Used in Cosmetics
Aluminum Hydroxide is a versatile ingredient primarily used for its physical properties. Its main functions in cosmetics include:
- Opacifying Agent and Colorant: It is widely used to make products opaque and is often used as a coating for pigments (such as Titanium Dioxide or Iron Oxides) to improve their stability, prevent aggregation, and enhance dispersion in the formula.
- Bulking Agent/Filler: It is used to increase the volume of a product, improve texture, and reduce the concentration of other more expensive ingredients, especially in powder and pressed cosmetic products (e.g., foundations, eyeshadows).
- Absorbent: It can help absorb excess oil or moisture on the skin.
- Antiperspirant Component: While the primary active antiperspirant ingredients are usually Aluminum Chlorohydrate or Aluminum Zirconium salts, Aluminum Hydroxide can be used as a stabilizer, buffer, or component in these formulations.
Application: As a fine white powder, it is typically incorporated into the oil phase or the powder blend of the formulation, ensuring proper dispersion to avoid a gritty texture.
Restrictions and Limitations
- Safety Status: Aluminum Hydroxide is generally recognized as safe (GRAS) for use in cosmetics by regulatory bodies worldwide, including the U.S. FDA and the European Union.
- Concentration: There are no specific concentration limits for its use as a colorant, opacifier, or bulking agent. The usage rate depends on the desired effect and formulation type.
- Aerosol Products: As with any fine powder, if used in aerosol spray products, manufacturers must ensure the particle size is controlled to minimize the risk of inhalation.
- pH Stability: It is amphoteric, meaning it can react with both acids and bases. Formulators should be mindful of the overall pH of the product to ensure stability and prevent unwanted reactions.
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Aluminium hydroxide
Analytical