Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 23, 2025
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All information on this page is verified using The Personal Care Products Council's (PCPC) INCI database. Our ingredient analyses are based exclusively on PCPC's technical data to ensure accuracy and reliability.

What Is Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates?

Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates is a finely milled ceramic powder made by combining several naturally occurring minerals that are rich in silicon, aluminum, calcium, magnesium, potassium, sodium and zinc oxides. These minerals are mined, purified then heated in large kilns until they fuse into a stable silicate matrix. The resulting solid is ground into an ultra-fine powder that disperses easily in creams, gels and powders.

Silicate blends have been used in pottery and skincare for centuries because of their absorbent and soothing nature. In recent decades cosmetic chemists noticed that adding trace metals like zinc gave the material a useful antimicrobial effect, leading to the modern multi-mineral version seen on ingredient labels today.

You will typically find Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates in clay or mud masks, setting and finishing powders, mattifying primers, deodorants, blemish spot gels, foot sprays and certain lightweight lotions where keeping bacteria at bay is a priority.

Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates’s Cosmetic Benefits/Uses

Its main value in a formula comes from its antimicrobial action. The blend of metal oxides, especially zinc, creates an environment that is hostile to many bacteria and fungi. When used in a product this helps keep the formula itself fresh without relying solely on synthetic preservatives and it can also reduce the amount of surface bacteria on the skin. That can translate into fewer breakouts, less odor in underarm or foot products and an overall cleaner feel after application.

Who Can Use Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates

This mineral blend suits most skin types thanks to its gentle, non-reactive nature. Oily, combination and blemish-prone skin can benefit from its bacteria-reducing effect while normal skin enjoys the light mattifying finish. Very dry or extremely sensitive skin should use it in moderation because its natural absorbency can pull away surface moisture and leave the skin feeling tight.

The ingredient is entirely mineral based with no animal derivatives so it is considered suitable for vegans and vegetarians provided the finished product aligns with their cruelty-free standards.

Pregnant or breastfeeding individuals are unlikely to absorb meaningful amounts of these stable silicates through intact skin and no specific warnings exist. This is not medical advice and anyone who is pregnant or nursing should review all personal care products with a qualified healthcare provider just to be sure.

Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates does not increase photosensitivity. In fact its light-scattering particles can give a slight protective boost, though it should never replace a dedicated sunscreen. The powder is also fragrance-free and gluten-free which may be helpful for those with fragrance or gluten concerns.

Potential Side Effects/Adverse Reactions

Responses to topical Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates vary by individual. The following list covers potential effects yet most users will not encounter any of them when the ingredient is properly formulated and applied.

  • Mild skin irritation or redness in those with highly reactive or compromised skin barriers
  • Dryness or feeling of tightness if used frequently on already dehydrated skin
  • Respiratory discomfort from inhaling loose powder during application of setting powders or dry masks
  • Rare allergic contact dermatitis triggered by sensitivity to trace metals within the blend
  • Temporary clogged pores if heavily layered under occlusive products on very dry skin types

If any of these reactions occur stop using the product and seek advice from a medical professional or dermatologist.

Comedogenic Rating

Rating: 1 out of 5

This score is low because the powder is inert, non-oily and tends to sit on top of the skin rather than sink into pores. Its fine particles can even help absorb excess sebum, which reduces the chance of blockages. Only when it is layered heavily under thick creams could it potentially trap debris and lead to congestion.

Suitable for most acne-prone or breakout-prone users.

Those with very dry skin that already flakes may notice the powder mixing with dead cells which can mimic clogged pores, so gentle exfoliation can help keep things clear.

Summary

Aluminum Calcium Magnesium Potassium Sodium Zinc Silicates is mainly used for its antimicrobial power that helps keep formulas fresh and lowers surface bacteria on the skin. The mineral blend also lightly mattifies and offers a silky feel.

It appears in clay masks, setting powders and deodorant sticks but is still considered a niche ingredient compared with big-name actives, mostly showing up in products that aim for a cleaner label with fewer synthetic preservatives.

Overall safety is high. The oxides are stable and the particles stay on the surface so systemic absorption is minimal. Side effects are rare and usually mild. As with any new cosmetic it is wise to patch test first to be sure your skin agrees.

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