The ingredient, explained

Tbhq

1‚4-Benzenediol, 2--1‚1-Dimethylethyl--; 2-tert-Butyl-1‚4-dihydroxybenzene; tert-Butyl hydroquinone

AntioxidantMaskingPerfuming

Ingredient guide

What it is and what it does

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

Antioxidant: Limits oxidation, including deterioration of formulation ingredients. This label alone does not show a clinical antioxidant effect in skin.
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.

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

We have not yet published a checked study for this exact ingredient. This is a gap in our coverage, not a finding that research does not exist or that the ingredient is ineffective.

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

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