What does Sesquiethoxytriethanolamine do?

Used in cosmetics as an emulsifier, a cleansing agent and a pH buffer. Sesquiethoxytriethanolamine is the product obtained by the reaction of ammonia and ethylene oxide consisting chiefly of Triethanolamine and hydroxyethoxyethyl diethanolamine.

Is Sesquiethoxytriethanolamine safe?

We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

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Sesquiethoxytriethanolamine

Concern score

Not assessed — no hazard data yet.

Sesquiethoxytriethanolamine in plain language

What it does: Used in cosmetics as an emulsifier, a cleansing agent and a pH buffer. Sesquiethoxytriethanolamine is the product obtained by the reaction of ammonia and ethylene oxide consisting chiefly of Triethanolamine and hydroxyethoxyethyl diethanolamine.
Emulsifying
Cleansing
Buffering
Emulsion stabilising
Is it a concern?: We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

What we know about this ingredient

Canonical ingredient record built from 1 public-source records.

Regulation

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

EUCosIngActiveSesquiethoxytriethanolamine is the product obtained by the reaction of ammonia and ethylene oxide consisting chiefly of Triethanolamine and hydroxyethoxyethyl diethanolamine.
- Sesquiethoxytriethanolamine is the product obtained by the reaction of ammonia and ethylene oxide consisting chiefly of Triethanolamine and hydroxyethoxyethyl diethanolamine.Source →

Expert safety opinions

No expert opinion on file for Sesquiethoxytriethanolamine. 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 Sesquiethoxytriethanolamine yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

1 data source

Where this comes from

CosIng
regulatory · updated 2026-09-23
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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.