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3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol

CAS 877815-31-1

Also registered as 12 other CAS numbers

150266-49-2 · 185116-92-1 · 193764-85-1 · 275373-95-0 · 512187-29-0 · 882006-00-0 · 883881-28-5 · 1234475-81-0 · 1369526-66-8 · 2204277-36-9 · 2857059-61-9 · 27306-78-1

3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol chemical structure

Concern score

Not assessed — no hazard data yet.

3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol in plain language

What it is

On cosmetic ingredient lists it appears as “PEG-8 trisiloxane”.

Also known as PEG-8 trisiloxane · C13H34O4Si3 · Jqrxtvaclhsvtf-uhfffaoysa-n · Pentra-Bark · Silicone polyether copolymer · Silwet L 77

Show all 9 names

Silwet L77 · surfactant · surfactant (type not specified)

What it does

Used in cosmetics as an emollient, an emulsifier and a skin-conditioning agent.

  • Emollient
  • Emulsifying
  • Skin conditioning
  • Cleansing
  • Foam boosting
  • Emulsifier
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. 3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • EUCosIngActivePEG-8 Trisiloxane is the alkoxylated derivative of Trisiloxane containing an average of 8 moles of ethylene oxide
    • PEG-8 Trisiloxane is the alkoxylated derivative of Trisiloxane containing an average of 8 moles of ethylene oxideSource →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 9 composition records across product categories including Furniture and furnishings, Personal care, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Surfactant (surface active agent), Softener and conditioner, Emulsifier.
    • EPA CPDat observed this chemical in 9 composition records across product categories including Furniture and furnishings, Personal care, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Surfactant (surface active agent), Softener and conditioner, Emulsifier.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as polymer.
    • openFDA substance registry classifies this ingredient as polymer.Source →

Expert safety opinions

No expert opinion on file for 3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol. 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 3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EPA Chemical and Products Database

    exposure · updated may 11, 2016

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →
Reference links (1)

Allergen profile

Canonical allergen markers detected on this ingredient. Each row is derived from the ingredient’s name or synonyms matching a known allergen class — useful when scanning a label for a specific allergy context.

  • FishContains · Oral (ingested)

    Source: chemindex_name_match

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 3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol in a product composition. These are source records, not Greenveil catalog products.

Source records

9

Named organisations

5

Furniture and furnishingsPersonal careCleaning products and household careConstruction and building materials

Typical roles

EmollientEmulsifyingSkin conditioningCleansingFoam boostingEmulsifier
See products using 3-Oxa-2,4-disilaheptan-1-ol, 2,2,4-trimethyl-4-(trimethylsiloxy)-, monoether with polyethylene glycol →