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CAS 646-13-9 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 3460615/10/2010

ISOBUTYL STEARATE

Isobutyl stearate

ISOBUTYL STEARATE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 646-13-9

CAS 646-13-9PubChem CID 12588

Isobutyl Stearate

isobutyl stearate has been reported in Aristolochia debilis, Aristolochia fontanesii, and other organisms with data available. — LOTUS - the natural products occurrence database

IUPAC name: 2-methylpropyl octadecanoate

Molecular formula: C22H44O2
Molecular weight: 340.6 g/mol
Exact mass: 340.334130642 Da
XLogP3: 9.9
Topological polar surface area: 26.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Octadecanoic acid, 2-methylpropyl esterStearic acid, isobutyl esterisobutyl octadecanoateHSDB 2177UNII-V8DPR6HNX3V8DPR6HNX3Stearic acid isobutyl esterUniflex IBYS

16 more reported names

Kessco IBSEINECS 211-466-1BRN 1792857Kemester 5415Emerest 2324Stearic acid, 2-methylpropyl esterEstol 1476Octadecanoic acid 2-methylpropyl esterISOBUTYL STEARATE [MI]ISOBUTYL STEARATE [HSDB]3-02-00-01017 (Beilstein Handbook Reference)ISOBUTYL stearic acidRefChem:1491032Methylpropyl octadecanoateISOBUTYL STEARATE [INCI]Stearic acid, 2methylpropyl ester

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID9027285

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for ISOBUTYL STEARATE

INCI name

ISOBUTYL STEARATE

Description

Isobutyl stearate

Record provenance

Inventory reference: 34606
Imported identity: ISOBUTYL STEARATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for ISOBUTYL STEARATE

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Key data

CAS

646-13-9

211-466-1

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.
SKIN CONDITIONING - EMOLLIENT: Acting as lubricants on the skin surface providing the skin with a soft and smooth appearance.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#13689 · ISOBUTYL STEARATE

Ingredients with overlapping formulation functions

ISOBUTYL MYRISTATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ISOBUTYL OLEATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ISOBUTYL PALMITATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ISOBUTYL PELARGONATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ISOBUTYL TALLOWATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ISOBUTYLATED LANOLIN OILANTISTATIC, HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

ISOCETYL ALCOHOLSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, VISCOSITY CONTROLLING

ISOCETYL BEHENATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How ISOBUTYL STEARATE appears in the CosIng inventory

The CosIng inventory lists ISOBUTYL STEARATE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

ISOBUTYL STEARATE is also tagged with 2 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

ISOBUTYL STEARATE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, ISOBUTYL STEARATE carries the following function designation(s):

CAS 646-13-9 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for ISOBUTYL STEARATE

This page reproduces the CosIng inventory entry for ISOBUTYL STEARATE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research ISOBUTYL STEARATE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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