The ingredient, explained

Hydrogenated Polydecene

A published expert assessment examines cosmetic-use safety.

EmollientHair conditioningMaskingPerfumingSkin conditioningSolvent

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Ingredient guide

What it is and what it does

1-Decene, homopolymer, hydrogenated

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Emollient: Helps soften and smooth the skin surface.
Hair conditioning: Improves cosmetic hair properties such as softness, shine or combability.
Masking: Reduces or conceals the formula's underlying odour or taste.
Perfuming: A formulation role for perfume and aromatic raw materials that give a product its scent.
Skin conditioning: A broad cosmetic role for maintaining skin condition. It does not identify a particular clinical benefit.
Solvent: Dissolves other ingredients in a formula.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗ · Danish Environmental Protection Agency: Cosmetic fragrance functions ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Safety assessment

Hydrogenated polydecene is explicitly included in the polyene group supported for the cosmetic uses and concentrations described.

What this does not tell us

The assessment combines direct and analogue toxicology data. It does not treat hydrogenated polyisobutene as the same chemical or establish clinical skincare efficacy.

Sources for this summary. PubMed 32975153 ↗

Research review checked Oct 1, 2026

Bounded targeted searches for the exact ingredient identity in primary research or final expert assessments, with selected-source verification. Not a systematic review.

Ingredient research is not proof that a product containing this ingredient works.