Sodium Silicoaluminate

Benefits

UV Protection

What is Sodium Silicoaluminate?

Sodium silicoaluminate is a synthetic inorganic compound, a hydrated form of sodium aluminosilicate made from silicon dioxide, aluminum oxide, and sodium oxide. It forms a white, lightweight, free-flowing powder with high absorbency and fine particle size. Primarily used in rinse-off products like facial scrubs, cleansers, toothpastes, and powders, as well as some leave-on items. It works by mechanically polishing the skin surface through mild abrasion, binding excess sebum and moisture for a drier feel, thickening formulations to enhance spreadability and suspension of other ingredients, and adding bulk to improve product volume and economy. Its inert nature and low reactivity make it versatile across cleansers, masks, and dry shampoos, contributing to smoother texture and matte effects without altering skin chemistry.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1 View on EWG →

PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Abrasive

Provides gentle mechanical exfoliation and polishing, helping remove surface dead skin cells and improve smoothness and slip in scrubs and cleansers.

Viscosity controlling agent

Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Bulking agent

Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.

Benefits

Provides gentle exfoliation to polish and smooth skin surface.

Enhances product stability and feel by controlling thickness and adding volume.

Helps scatter light for minor UV protection and absorbs oils for balanced finish.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
People seeking mild physical exfoliation in scrubs or cleansers.	Those with extremely fragile skin barriers prone to micro-abrasion.
Individuals with oily skin needing absorbency in powders or masks.	People sensitive to aluminosilicates from prior reactions.
Users wanting improved texture in stable, easy-to-apply formulas.	Individuals avoiding synthetic mineral-derived particles.

Safety Notes

Rated low hazard by safety assessors with no significant concerns in typical use.
Minimal absorption and irritation potential in cosmetic applications.

Frequently Asked Questions about Sodium Silicoaluminate

What does sodium silicoaluminate do in skincare?

It exfoliates mildly, thickens products, bulks formulas, and absorbs oils for better texture.

Is it safe for daily use?

Generally safe at cosmetic levels with low irritation risk from reviews.

Does it help with oiliness?

Yes, its absorbent properties reduce shine in powders and cleansers.