Is TRISTEARIN safe to use in EU cosmetics?

TRISTEARIN is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What other records share CAS 555-43-1?

CAS 555-43-1 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.

How do I check if my formula contains TRISTEARIN?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3877724/01/2011

TRISTEARIN

Glycerol tristearate

TRISTEARIN 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 555-43-1

CAS 555-43-1PubChem CID 11146

Tristearin

Tristearoylglycerol is a triglyceride that is glycerol in which all three hydroxy groups have been formally esterified with stearic acid. It has a role as a plant metabolite and a Caenorhabditis elegans metabolite. It is functionally related to an octadecanoic acid. — ChEBI

IUPAC name: 2,3-di(octadecanoyloxy)propyl octadecanoate

Molecular formula: C57H110O6
Molecular weight: 891.5 g/mol
Exact mass: 890.83024122 Da
XLogP3: 25.2
Topological polar surface area: 78.9 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 6
Covalent units: 1
Defined stereocentres: 0

Also known as

Glycerol tristearateGlyceryl tristearateTrioctadecanoinTRISTEAROYLGLYCEROLStearic triglycerideStearin, tri-Spezialfett 118Stearoyl triglyceride

16 more reported names

Dynasan 118Stearic acid triglycerin esterStearic acid triglycerideGlycerol, trioctadecanoateOctadecanoic acid, 1,2,3-propanetriyl esterP6OCJ2551RCHEBI:45956209-097-6RefChem:933543Propane-1,2,3-triyl tristearatetriacylglycerolC57H110O6propane-1,2,3-triyl trioctadecanoateTG(18:0/18:0/18:0)1,2,3-Trioctadecanoylglycerol1,2,3-trioctadecanoyl-glycerol

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:45956
EPA DTXSID:DTXSID8047503
PubMed:22964391
PubMed:22920386
PubMed:22889174
PubMed:22816120
PubMed:22728260
PubMed:22632389
PubMed:22619540
PubMed:22515238
PubMed:22513391
PubMed:22496604
PubMed:22465062
PubMed:22405582

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 TRISTEARIN

INCI name

TRISTEARIN

Description

Glycerol tristearate

Record provenance

Inventory reference: 38777
Imported identity: TRISTEARIN
Source update: 24/01/2011

European Commission CosIng source notes

Annex records for TRISTEARIN

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Key data

CAS

555-43-1

209-097-6

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.
VISCOSITY CONTROLLING: Increasing or decreasing the viscosity (thickness) of cosmetics.

Official EU ingredient-name evidence

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

#29483 · TRISTEARIN

Ingredients with overlapping formulation functions

TRIPALMITOLEINREFATTING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, VISCOSITY CONTROLLING

TRIRICINOLEINREFATTING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, VISCOSITY CONTROLLING

TRIS(PEG-2 PHENYLALANYLCARBOXAMIDO) CYCLOHEXANEEMULSION STABILISING, VISCOSITY CONTROLLING

TRISEBACINREFATTING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, VISCOSITY CONTROLLING

TRITICUM AESTIVUM STRAW WAXBINDING; SKIN CONDITIONING - EMOLLIENT; EMULSION STABILISING; VISCOSITY CONTROLLING

TRITICUM VULGARE KERNEL FLOURABRASIVE, BULKING, VISCOSITY CONTROLLING

TRITICUM VULGARE STARCHABRASIVE, ABSORBENT, BINDING, BULKING, VISCOSITY CONTROLLING

TROMETHAMINE ACRYLATES/ACRYLONITROGENS COPOLYMERFILM FORMING, VISCOSITY CONTROLLING

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 TRISTEARIN appears in the CosIng inventory

The CosIng inventory lists TRISTEARIN 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.

TRISTEARIN 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

TRISTEARIN 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, TRISTEARIN carries the following function designation(s):

CAS 555-43-1 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 TRISTEARIN

This page reproduces the CosIng inventory entry for TRISTEARIN 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 TRISTEARIN 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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Tools & next steps

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