The ingredient, explained

Caprylic Acid

A published expert safety assessment covers this exact ingredient.

CleansingEmulsifyingMaskingPerfumingSurfactant

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Ingredient guide

What it is and what it does

Octanoic acid

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

Cleansing: Helps remove material from the body surface.
Emulsifying: Helps liquids that do not normally mix form a mixture.
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.
Surfactant: Changes surface tension to help a product distribute or interact with other materials.

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

Panel judged described cosmetic uses safe when formulated to be non-irritating and non-sensitizing, potentially determined by QRA.

What this does not tell us

Group read-across and dated use levels. Concentrated free acid can be corrosive in animal testing; conclusion is conditional formulation safety, not efficacy.

Sources for this summary. Published source ↗

Research review checked Oct 1, 2026

Bounded review of local candidates, exact-name indexed primary journal/PubMed safety and topical searches; not a systematic review.