What does Cyclotetrasiloxane do?

Used in consumer products as a solvent and a conditioner.

Is Cyclotetrasiloxane safe?

We haven't assessed a concern score for this ingredient yet.

beauty
cleaning
industrial

Cyclotetrasiloxane

CAS 293-51-6

Concern score

Not assessed — no hazard data yet.

Cyclotetrasiloxane in plain language

What it is: Also known as 1,3,5,7,2,4,6,8-Tetroxatetrasilocane · 1,3,5,7,2,4,6,8-Tetroxatetrasilicocane
What it does: Used in consumer products as a solvent and a conditioner.
Solvent
Conditioner
Is it a concern?: We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Cyclotetrasiloxane appears in these published regulatory listings.

Recorded in these product areas

Found in consumer products
Beauty
Cleaning
Industrial

USEPAcommercial use observedEPA CPDat observed this chemical in 421 composition records across product categories including Construction and building materials, Personal care, Construction. EPA CPDat classifies this chemical for functional uses including Solvent, Softener and conditioner, Defoamer.
- EPA CPDat observed this chemical in 421 composition records across product categories including Construction and building materials, Personal care, Construction. EPA CPDat classifies this chemical for functional uses including Solvent, Softener and conditioner, Defoamer.Source →

Expert safety opinions

No expert opinion on file for Cyclotetrasiloxane. 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 Cyclotetrasiloxane 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

EPA Chemical and Products Database
exposure · updated september 30, 2011
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
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 Cyclotetrasiloxane in a product composition. These are source records, not Greenveil catalog products.

Source records

421

Named organisations

Construction and building materialsPersonal careConstructionVehicle

Typical roles

SolventConditioner

See products using Cyclotetrasiloxane →

Catalog

Found in these products

Their ingredient lists include Cyclotetrasiloxane; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 15 →Find products without it →