beauty
industrial

Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester

CAS 2604601-20-7

Also registered as 2 other CAS numbers

42131-25-9 · 59219-71-5

Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester chemical structure

Concern score

Not assessed — no hazard data yet.

Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester in plain language

What it is: On cosmetic ingredient lists it appears as “Isononyl isononanoate”.
Also known as Isononyl isononanoate · 3,5,5-Trimethylhexyl 3,5,5-trimethylhexanoate · 3 5 5-TRIMETHYLHEXYL 3 5 5-TRIMETHYL- · 3,5,5-Trimethyl-1-hexyl 3,5,5-trimethylhexanoate · AKOS015902988 · Dermol 99
Show all 15 names
Hatcol 5131 · isononyl ester Isononanoic acid · Isononyl 3,5,5 trimethylhexanoate · Kak 99 · Lanol 99 · Salacos 99 · Tegosoft Ini · UNII-S4V5BS6GCX · Wickenol 151
What it does: Used in cosmetics as an emollient, a skin-conditioning agent and an antistatic agent.
Emollient
Skin conditioning
Antistatic
Conditioner
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. Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester appears in these published regulatory listings.

Recorded in these product areas

Found in consumer products
Industrial

EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Softener and conditioner, Anti-static agent.
- EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Softener and conditioner, Anti-static agent.Source →

Expert safety opinions

No expert opinion on file for Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester. 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 Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

4 data sources

Where this comes from

CosIng
regulatory · updated 2026-09-23
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EPA Chemical and Products Database
exposure · updated 2019-06-21
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
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.

Where it has been recorded

How often EPA CPDat has listed Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester in a product composition. These are source records, not Greenveil catalog products.

Named organisations

Typical roles

EmollientSkin conditioningAntistaticConditioner

See products using Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester →

Catalog

Found in these products

Their ingredient lists include Hexanoic acid, 3,5,5-trimethyl-, 3,5,5-trimethylhexyl ester; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 116 →Find products without it →