Is PRISTANE safe to use in EU cosmetics?

PRISTANE 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 1921-70-6?

CAS 1921-70-6 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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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 7868315/10/2010

PRISTANE

2,6,10,10-Tetramethylpentadecane

PRISTANE 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 1921-70-6

CAS 1921-70-6PubChem CID 15979

Pristane

Pristane is a norterpene that is an acyclic saturated hydrocarbon derived from phytane by loss of its C-16 terminal methyl group. It has a role as an immunological adjuvant and a biomarker. It is a norterpene and a long-chain alkane. — ChEBI

IUPAC name: 2,6,10,14-tetramethylpentadecane

Molecular formula: C19H40
Molecular weight: 268.5 g/mol
Exact mass: 268.313001276 Da
XLogP3: 9.3
Topological polar surface area: 0.0 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 0
Covalent units: 1
Defined stereocentres: 0

Also known as

NorphytaneNorphytanPentadecane, 2,6,10,14-tetramethyl-PristanNSC 11485226HZV48DT1NSC-114852CHEBI:53181

16 more reported names

RefChem:46199217-650-8tetramethylpentadecanemeso-Pristane2,6,10,10-TetramethylpentadecaneEINECS 217-650-82,6,10,14-tetramethyl-pentadecaneBRN 1720538UNII-26HZV48DT1Meso-formNorphytane;TMPDNorphytane, robuoyPRISTANE [MI]3-01-00-00570 (Beilstein Handbook Reference)2,10,14-TetramethylpentadecaneHSDB 8345

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:53181
EPA DTXSID:DTXSID70870919
PubMed:33072095
PubMed:24423102
PubMed:22723547
PubMed:22566931
PubMed:22162633
PubMed:21808234
PubMed:21191074
PubMed:21162738
PubMed:20082073
PubMed:20064217
PubMed:19808647
PubMed:19678912

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 PRISTANE

INCI name

PRISTANE

Description

2,6,10,10-Tetramethylpentadecane

Record provenance

Inventory reference: 78683
Imported identity: PRISTANE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for PRISTANE

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Key data

CAS

1921-70-6

217-650-8

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.

Official EU ingredient-name evidence

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

#23249 · PRISTANE

Ingredients with overlapping formulation functions

PRIMULA VERIS SEED OILSKIN CONDITIONING

PRIMULA VULGARIS EXTRACTSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SOOTHING

PRINSEPIA UTILIS SEED EXTRACTASTRINGENT, HAIR CONDITIONING, SKIN CONDITIONING

PRINSEPIA UTILIS SEED OILSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

PROCOLLAGENHAIR CONDITIONING, SKIN CONDITIONING

PROGESTERONESKIN CONDITIONING

PROLINEHAIR CONDITIONING, SKIN CONDITIONING

PROLYL HISTAMINE HCLSKIN CONDITIONING

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 PRISTANE appears in the CosIng inventory

The CosIng inventory lists PRISTANE 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.

PRISTANE is also tagged with 1 cosmetic function 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

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

SKIN CONDITIONING

CAS 1921-70-6 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 PRISTANE

This page reproduces the CosIng inventory entry for PRISTANE 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 PRISTANE 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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