Polymethysilsesquioxane
Polymethysilsesquioxane
POL
9/10
Concern level
High concern
A silicone resin polymer used in cosmetics to improve slip, blur the look of pores and fine lines, and give a soft-focus, silky finish. It is common in powders, primers, foundations, and other texture-enhancing formulas. It is generally considered inert, low-odor, and low-absorption due to its polymeric nature.
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Benefits
Improves TextureMinimizes Pores
Concerns
Silicone
Chemical Properties
Typical Concentration
1.00% - 20.00%CAS Number: 68554-70-1
Skin Type Compatibility
dry skin7/10
oily skin9/10
sensitive skin9/10
acne prone9/10
mature skin9/10
normal skin9/10
Interactions
incompatible with: none known of practical significance in cosmetics
Risks & Warnings
Low overall risk. Loose powder formats can cause transient eye or respiratory irritation if inhaled or dispersed heavily. Rare sensitivity may occur in very reactive users, but true allergic reactions are uncommon. It is not considered comedogenic and does not usually increase photosensitivity.
Vegan Cruelty-Free
