What Is Sodium Magnesium Silicate?

••• Anchalee Phanmaha/Moment/GettyImages

Sodium magnesium silicate, a substance known as a type of talc, is used for many consumer and industrial applications as a bulking agent in liquid products.

Vital Statistics

Normally identified in industry by Chemical Abstracts Number (CAS) 53320-86-8, sodium magnesium silicate is an off-white powder with the following synonyms: silicic acid, lithium magnesium sodium salt, synthetic magnesium lithium silicate and lithium magnesium sodium silicate.


Sodium magnesium silicate works primarily as a bulking agent or a binding agent in order to increase the viscosity of a liquid product.

Common Products

Products that commonly contain sodium magnesium silicate include cosmetic creams, pastes and gels, including body washes, facial creams and toothpaste.


The U.S. Environmental Protection Agency lists sodium magnesium silicate on INER, a list of inert ingredients permitted for use in pesticides. In order for a substance to be listed on INER, it cannot be known to have harmful effects on living organisms.

Nothing to Worry About

Most experts agree that sodium magnesium silicate is safe. The Environmental Working Group, an active watchdog group with a database of harmful substances in cosmetic products, lists sodium magnesium silicate as a "low hazard."

Related Articles

What Is Sodium Lauryl Sulfate?
Alternative Solvents to Benzene
Environmental Concerns With Sodium Bicarbonate
What Chemicals Are Harmful to Rubber Seals?
What is Sodium Benzoate?
Physical & Chemical Properties of Sodium Bicarbonate
Toxicity of Household Bleach
Isopropanol Alcohol Vs. Isopropyl Alcohol
What Is Propylene Glycol
What Is Urethane?
How to Make Bromine Water in the Chemistry Lab
What Products Have Potassium Nitrate?
List of Household Bases & Acids
Definition of Acidic Solution
What Is the Usage of Sodium Tripolyphosphate?
The Chemical Properties of Lemon Juice
Uses of Zinc Carbonate
What Is Urethane Used For?
Is Methanol & Isopropyl Alcohol the Same Thing?
What Are the Raw Materials of Plastic Bottles?