What does Tetraaluminum trichloride nonahydroxide do?

Used in cosmetics as an antiperspirant, an astringent and a deodorant.

Is Tetraaluminum trichloride nonahydroxide safe?

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

beauty

Tetraaluminum trichloride nonahydroxide

CAS 11089-92-2

Concern score

Not assessed — no hazard data yet.

Tetraaluminum trichloride nonahydroxide in plain language

What it is: On cosmetic ingredient lists it appears as “Aluminum sesquichlorohydrate”.
Also known as Aluminum sesquichlorohydrate · Aluminum chloride hydroxide (Al4Cl3(OH)9) · Aluminum;nonachloride;henoctacontahydroxide · Al4Cl3(OH)9 · Aluminum chloride hydroxide (Al4(OH)9Cl3) · aluminium sesquichlorohydrate
What it does: Used in cosmetics as an antiperspirant, an astringent and a deodorant.
Antiperspirant
Astringent
Deodorant
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

EPA DSSTox provides the canonical identifier, structure, and synonym profile for this chemical.

Regulation

No restrictions found. Tetraaluminum trichloride nonahydroxide appears in these published regulatory listings.

EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

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

5 data sources

Where this comes from

CosIng
regulatory · updated 2026-09-23
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 →

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.

Catalog

Found in these products

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

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