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Phenyl trimethicone

CAS 2116-84-9

Also registered as 2 other CAS numbers

70131-69-0 · 195868-36-1

Concern score

Not assessed — no hazard data yet.

Phenyl trimethicone in plain language

What it is

On cosmetic ingredient lists it appears as “Polyphenylsilsesquioxane”.

Also known as Polyphenylsilsesquioxane · Ph Silsesquioxanes · substituted polysiloxane

What it does

Used in cosmetics as an occlusive, a hair conditioner and an antifoaming agent. Phenyl Trimethicone is the siloxane polymer.

  • Occlusive
  • Hair conditioning
  • Antifoaming
  • Binding
  • Film forming
  • Opacifying
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Phenyl trimethicone appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Industrial
  • EUCosIngActive2 entries
    • Phenyl Trimethicone is the siloxane polymer that conforms generally to the formulaSource →
    • Polyphenylsilsesquioxane is a polymeric silicone resin that conforms generally to the formula, where R is a phenyl group.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 25 composition records across product categories including Personal care, Raw materials.
    • EPA CPDat observed this chemical in 25 composition records across product categories including Personal care, Raw materials.Source →

Expert safety opinions

No expert opinion on file for Phenyl trimethicone. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for Phenyl trimethicone yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

2 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated July 2018

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Phenyl trimethicone in a product composition. These are source records, not Greenveil catalog products.

Source records

25

Named organisations

5

Personal careRaw materials

Typical roles

OcclusiveHair conditioningAntifoamingBindingFilm formingOpacifying
See products using Phenyl trimethicone →

Catalog

Found in these products

Cosmetic and personal-care products that list Phenyl trimethicone are shown first. Their ingredient lists include Phenyl trimethicone; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 150 →Find products without it →