Sodium Magnesium Fluorosilicate

What is Sodium Magnesium Fluorosilicate?

Sodium Magnesium Fluorosilicate is a synthetic inorganic compound derived from sodium, magnesium, and fluorosilicic acid through chemical synthesis. Commonly featured in exfoliating cleansers, facial scrubs, body polishes, and select oral care products, it serves multiple formulation roles. As an abrasive, it delivers subtle mechanical polishing to buff away surface impurities and enhance skin smoothness. Its absorbent nature draws in sebum and moisture to promote a less greasy finish. The ingredient also opacifies formulations for a uniform, creamy look, suspends particles to prevent settling, and fine-tunes viscosity for better spreadability and stability. These properties make it valuable in products aiming for refined texture and visual appeal without compromising usability.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1 View on EWG →

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.

Absorbent

Absorbs water and/or sebum to reduce greasiness and shine, improve dry touch, and help keep powders and emulsions feeling lighter on skin.

Opacifying agent

Makes a formula less transparent to create a creamy, opaque look; can also help visually mask suspended particles and improve aesthetic uniformity.

Suspending agent

Keeps insoluble particles (pigments, beads, actives) evenly dispersed by increasing viscosity or forming a network, preventing settling and separation.

Viscosity controlling agent

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

Benefits

Gentle polishing action smooths skin surface in exfoliants.

Controls shine by absorbing excess oils for a drier touch.

Enhances product texture, stability, and opaque aesthetics.

Who It's For

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

Who May Benefit	Who Should Avoid
Users of scrubs seeking mild exfoliation and polish.	People with fluoride sensitivities.
Oily skin types wanting reduced greasiness.	Individuals with highly reactive skin.
Those preferring stable, creamy-textured cleansers.	Those applying to broken or irritated areas.

Safety Notes

Regarded as low hazard in cosmetic use by safety assessments.
Rinse thoroughly; minimize incidental ingestion.

Frequently Asked Questions about Sodium Magnesium Fluorosilicate

What does it do in skincare?

Acts as a mild abrasive for polishing, absorbs oils, opacifies products, suspends particles, and controls thickness.

Is it safe for daily use?

Low hazard rating supports safety in rinse-off products when used as directed.

Does it suit sensitive skin?

Generally low irritation, but patch test if prone to reactions.