Article last updated: October 15, 2024
Magnesium carbonate, often labeled as CI 77713 in cosmetic formulations, is a naturally occurring mineral derived from the earth. Chemically, it is composed of magnesium, carbon, and oxygen, forming a white, powdery substance that is insoluble in water. This mineral is typically sourced from magnesite ores or can be synthetically produced through a reaction between magnesium salts and sodium bicarbonate.
The use of magnesium carbonate in cosmetics dates back to ancient times when it was utilized for its absorbent properties. Over the years, its application has expanded, thanks to its multifunctional capabilities. Today, it is a common ingredient in a variety of cosmetic products, ranging from powders and foundations to skincare items.
The production of magnesium carbonate involves a straightforward process. When derived from natural sources, magnesite ore is mined and then subjected to a purification process to remove impurities. For synthetic production, magnesium salts are reacted with sodium bicarbonate, resulting in the precipitation of magnesium carbonate. This precipitate is then filtered, washed, and dried to produce the fine, white powder used in cosmetics.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Magnesium Carbonate:
Magnesium Carbonate is an excellent absorbent. This means it can soak up excess oils and moisture from the skin. If you have oily skin, products containing Magnesium Carbonate can help keep your skin looking matte and less shiny throughout the day. It’s also useful in products like deodorants, where it helps to absorb sweat and keep you feeling fresh.
As a binding agent, Magnesium Carbonate helps to hold the ingredients in a cosmetic product together. This ensures that the product maintains its consistency and effectiveness over time. For example, in pressed powders and eyeshadows, Magnesium Carbonate helps to keep the product compact and prevents it from crumbling.
Magnesium Carbonate is used as a bulking agent, which means it can increase the volume of a product without affecting its other properties. This is particularly useful in products like face powders and foundations, where it helps to create a lightweight, airy texture that is easy to apply and blend.
In the realm of cosmetics, Magnesium Carbonate can also function as a colorant. It imparts a white color to products, which can be useful in formulations where a bright, clean appearance is desired. This is often seen in products like toothpaste and certain skincare items.
Magnesium Carbonate acts as an opacifying agent, which means it can make a product more opaque. This is beneficial in products where a solid, non-transparent appearance is preferred, such as in creams and lotions. It helps to give these products a rich, luxurious look and feel.
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).
Magnesium carbonate is generally considered safe for topical use in cosmetics. It is non-toxic and non-irritating for most individuals, making it suitable for a wide range of skin types. However, as with any cosmetic ingredient, there are potential side effects to be aware of:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of magnesium carbonate during pregnancy are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice before using products containing this ingredient.
Adverse reactions to magnesium carbonate are relatively uncommon. However, it is always recommended to conduct a patch test before widespread usage to ensure that your skin does not react negatively to the ingredient.
Magnesium carbonate has a comedogenic rating of 1, which means it is very unlikely to clog pores. This makes it a suitable option for individuals who are prone to acne, blemishes, or breakouts.
