What Is Diphenylmethylsiloxy Phenyl Methicone/Phenyl Silsesquioxane Crosspolymer?
Diphenylmethylsiloxy Phenyl Methicone/Phenyl Silsesquioxane Crosspolymer is a specialty silicone created by linking two silicone families: phenyl methicone and phenyl silsesquioxane. The result is a three dimensional network of siloxane units that give the ingredient its film forming skill. Manufacturers start with basic silica from sand, convert it into chlorosilanes, then react those with phenyl groups and methyl groups in controlled steps. The final polymer is crosslinked in a way that keeps it flexible yet stable when spread on skin. First explored in the late 1990s as chemists searched for lightweight alternatives to heavy mineral oils, it found a home in color cosmetics for its smooth finish. Today it shows up in primers, foundations, pressed and loose powders, long wear lip products, sunscreens, anti-aging serums, and setting sprays where a soft focus feel and good wear time are needed.
Diphenylmethylsiloxy Phenyl Methicone/Phenyl Silsesquioxane Crosspolymer’s Cosmetic Benefits/Uses
This ingredient delivers one key function that improves many types of formulas.
As a film former, it spreads into a thin breathable layer that helps pigments and active ingredients stay put. The flexible film resists water and sebum so makeup lasts longer and skincare actives stay on the surface long enough to work. It also smooths tiny lines giving skin a silky touch without a greasy afterfeel.
Who Can Use Diphenylmethylsiloxy Phenyl Methicone/Phenyl Silsesquioxane Crosspolymer
This silicone film former is generally well tolerated by all skin types. Its lightweight texture suits oily and combination skin because it feels dry to the touch and helps control shine, while the silky finish can soften the look of rough or dry patches. Sensitive skin usually handles it well since the molecule is inert and fragrance free, though a minority of users who react to silicones in general might notice discomfort or clogged pores.
The ingredient is made entirely from inorganic silica and petrochemical-derived phenyl groups, with no animal starting materials or by-products. That makes it suitable for vegans and vegetarians provided the finished product is certified cruelty free and free of other animal ingredients.
Current safety data show no evidence of systemic absorption, hormone disruption or reproductive toxicity when used topically. For that reason products containing this polymer are considered safe for people who are pregnant or breastfeeding. This is not medical advice and anyone expecting or nursing should run their skincare routine past a qualified doctor just to be safe.
The molecule is photostable and does not make skin more sensitive to sunlight. There are no known interactions with common skincare actives, preservatives or sunscreen filters.
Potential Side Effects/Adverse Reactions
Reactions to topical Diphenylmethylsiloxy Phenyl Methicone/Phenyl Silsesquioxane Crosspolymer vary from person to person. The issues listed below are potential outcomes only and are unlikely for most users when the ingredient is properly formulated and used as directed.
- Transient skin irritation such as mild redness, stinging or itching
- Worsening of breakouts in individuals who are highly prone to silicone-related congestion
- Allergic contact dermatitis in rare cases
- Eye irritation if the product accidentally gets into the eyes
If any of these effects occur stop using the product and seek medical advice if symptoms persist or worsen.
Comedogenic Rating
Rating: 1 / 5 — low likelihood of clogging pores
This crosslinked silicone sits on the surface as a breathable mesh rather than seeping into follicles. Its large, bulky structure cannot penetrate deeply and it leaves a dry-touch finish that does not trap much oil. Because it is not heavy or occlusive like some oils or waxes, most dermatology references place similar phenyl silicones at the low end of the comedogenic scale.
Suitable for acne-prone skin in most cases, though pairing it with very greasy emollients or not cleansing properly could still contribute to congestion.
Summary
Diphenylmethylsiloxy Phenyl Methicone/Phenyl Silsesquioxane Crosspolymer is used mainly as a film former. It spreads into a thin flexible layer that anchors pigments, boosts water resistance, cuts shine and blurs lines for a smoother look. The three-dimensional silicone network gives makeup longer wear and helps skincare actives stay where they are applied.
While not as famous as workhorse silicones like dimethicone it has carved out a steady niche in long-wear foundations, primers, sunscreens, lip colors and setting sprays thanks to its silky feel and soft focus payoff.
Current safety data show it is non toxic, non sensitizing and photostable when used topically. Most people tolerate it well but, as with any new cosmetic ingredient, patch test a small area first to make sure your skin agrees with it.