Article last updated: October 15, 2024
Zinc Hydroxide, also known by its chemical formula Zn(OH)₂, is a white, powdery substance that is primarily used as an absorbent in cosmetic products. It can also be referred to as Zinc Dihydroxide or Zinc Hydrate. This ingredient is derived from zinc, a naturally occurring mineral that is essential for various biological functions.
Historically, zinc compounds have been used for centuries in various medicinal and cosmetic applications due to their beneficial properties. Zinc Hydroxide itself became popular in the cosmetic industry as manufacturers sought effective and safe absorbent materials to enhance the performance of their products. Its ability to absorb excess oils and moisture makes it an ideal component in a variety of skincare and makeup formulations.
The production of Zinc Hydroxide typically involves a chemical reaction between zinc salts, such as zinc sulfate or zinc chloride, and a strong base like sodium hydroxide. This reaction results in the formation of Zinc Hydroxide as a precipitate, which is then filtered, washed, and dried to obtain the final product. This process ensures that the Zinc Hydroxide used in cosmetics is of high purity and quality, making it suitable for use on the skin.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Zinc Hydroxide:
Zinc Hydroxide is primarily recognized for its absorbent properties. This means it has the ability to soak up excess oils and moisture from the skin. In practical terms, this can help in reducing the greasy or shiny appearance of the skin, making it particularly useful in products designed for oily or combination skin types. By absorbing excess sebum, Zinc Hydroxide can help in maintaining a matte finish and potentially reduce the likelihood of clogged pores, which can lead to acne and other skin issues.
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).
Zinc Hydroxide is generally considered safe for topical use in cosmetics. However, as with any ingredient, there are potential side effects that users should be aware of:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Zinc Hydroxide 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.
Side effects and adverse reactions from Zinc Hydroxide are relatively uncommon. However, it is always recommended to perform a patch test before widespread usage to ensure there is no adverse reaction.
Zinc Hydroxide has a comedogenic rating of 1, which means it is very unlikely to clog pores. This makes it a suitable ingredient for individuals who are prone to acne, blemishes, or breakouts.
