Silica

SIL

8/10

Concern level

High concern

Silica is synthetic amorphous silicon dioxide used in cosmetics as an absorbent, bulking, anti-caking, opacifying, and texture-improving powder. CIR reviewed silica as used in cosmetics and concluded it is safe as used; PubChem identifies silica as silicon dioxide (SiO2) with CAS 7631-86-9 and molecular weight 60.08 g/mol. ([cir-safety.org](https://www.cir-safety.org/sites/default/files/Silica%20%26%20Silicates.pdf))

Pore-clogging

Non-comedogenic

Pregnancy

Safe

Regulatory

No data

Benefits

Controls Oil ProductionImproves TextureMinimizes Pores

Chemical Properties

Molecular Weight

60.08 g/mol

Typical Concentration

0.10% - 66.00%

CAS Number: 7631-86-9

Skin Type Compatibility

dry skin4/10

oily skin9/10

sensitive skin5/10

acne prone9/10

mature skin6/10

normal skin8/10

Interactions

incompatible with: No specific chemical incompatibilities are established for topical cosmetic use., Use extra caution with aerosolized or loose-powder systems because inhalation exposure is the main practical safety concern.

Risks & Warnings

Main documented concerns are inhalation of fine airborne powders in spray/loose-powder formats and mild eye irritation if the material is not rinsed out. CIR notes cosmetic silica is synthetic amorphous silica; crystalline silica is not the cosmetic form addressed in the report. ([cir-safety.org](https://www.cir-safety.org/sites/default/files/Silica%20%26%20Silicates.pdf))

Vegan Cruelty-Free

Found In Products

Shiseido

Benefiance Wrinkle Smoothing Day Cream SPF 23

CLINIQUE

Dramatically Different™ Moisturizing Gel for Skin Barrier Repair

Kiehl's Since 1851