The ingredient, explained

Cinnamal

Cinnamal has published research relevant to the stated experimental context.

DenaturantFlavouringPerfuming

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Ingredient guide

What it is and what it does

Cinnamaldehyde; 2-Propenal, 3-phenyl-

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

Denaturant: Makes a product unpalatable, often in alcohol-containing formulas.
Flavouring: Adds or modifies a product's flavour, including in oral-care products such as toothpaste.
Perfuming: A formulation role for perfume and aromatic raw materials that give a product its scent.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗ · European Commission JRC: Flavouring roles in toothpaste formulations ↗ · 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

Human contact allergy research

In the use test,13 of 18 sensitized patients developed eczema, with some responses delayed beyond seven days.

What this does not tell us

Selected already-sensitized eczema patients, not incidence in the general population. Concentration, solvent and exposure duration matter; historical permitted-use language is not reproduced as current regulation.

Sources for this summary. PubMed 8833458 ↗

Research review checked Oct 1, 2026

Selective exact-identity review of 3 supplied local candidates and the targeted primary-source search recorded below. Bounded review, not a systematic search.