Science
Mechanism of Action
This compound primarily functions by absorbing surplus sebum from both the skin's surface and within pores, leading to a visibly fresher, oil-free complexion. Its alkaline and amphoteric nature allows it to neutralize acidic compounds, providing crucial pH regulation beneficial for formulation stability and potentially assisting with inflammatory skin conditions such as eczema and dermatitis. Furthermore, the magnesium carbonate component exhibits hygroscopic properties, aiding in skin moisture retention, and may contribute anti-inflammatory, soothing effects, alongside potential regulation of skin pigmentation.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Maintaining a pH of 8 or higher is crucial for ensuring the stability of the carbonate component. Magnesium hydroxide carbonate forms a suspension in water, typically exhibiting a pH of approximately 10.5 for a 50 g/L suspension at 20 °C. While practically insoluble in water and ethanol, its magnesium carbonate component is sparingly soluble in water but dissolves readily in acids with effervescence. It can be incorporated as a filler to enhance texture and is particularly effective in anhydrous cosmetic systems for oil control, mitigating syneresis, and supporting high oil loading.
Safety
Safety Profile
The CIR Expert Panel has determined that key constituent compounds, such as alumina and aluminum hydroxide, are safe for use in current cosmetic applications and concentrations. Magnesium hydroxide and magnesium carbonate are also recognized for their low toxicity and non-comedogenic profile in topical formulations. Although the raw material 'Aluminum magnesium carbonate hydroxide' (CAS 11097-59-9) carries GHS hazard statements related to acute oral toxicity and irritation (skin, eye, respiratory tract), these primarily address handling of the undiluted ingredient; its integration into cosmetic formulations at appropriate, low concentrations is considered safe.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is a valuable multi-tasker, primarily appreciated for its efficacy in absorbing excess oil and regulating skin pH, making it highly beneficial for a broad range of skincare and cosmetic formulations.
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