Ingredient on hair labels

Eugenol

TheWashDay editorial · Updated · From the EU ingredient register and the makers’ own labels · How we match names

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Eugenol is on 4 of the 177 hair-product labels we compare, from 3 makers, most often in deep conditioners. Its uses in the EU ingredient register are perfuming, denaturant and tonic. None of these labels names it among its first five ingredients.

What it is

The register’s chemical name for it: “Phenol, 2-methoxy-4-(2-propenyl)-.”

EU register name (INCI)
EUGENOL
CAS number
97-53-0
EC number
202-589-1

What the register lists it for

These are the uses the European Commission’s CosIng register lists for Eugenol in any cosmetic, hair roles first. They say why a maker might add it, not what it does in one formula, and they aren’t a safety rating.

Perfuming

Used as a perfume or scent material. Essential oils and their scent compounds, such as linalool and limonene, carry this role.

Register definition: “Used for perfume and aromatic raw materials.”

Denaturant

Makes alcohol taste too bad to drink. It is why labels say Alcohol Denat.

Register definition: “Rendering cosmetics unpalatable. Mostly added to cosmetics containing ethyl alcohol to make it unsuitable for ingestion.”

Tonic

The register’s role for ingredients said to give skin and hair a feeling of well-being. Many plant extracts carry it.

Register definition: “Producing a feeling of well-being on skin and hair.”

Where it sits on each label

US labels list ingredients from most to least, except that those at 1% or less may follow in any order. A name near the top is a large part of the formula. A label doesn’t mark where the 1% point falls, so further down, the order says little about how much is in it.

Every label, product by product (4)

Each line runs from the first name on a label to the last; a dot is where this ingredient sits. Makers change formulas now and then; if the list on your bottle differs, go by your bottle.

Your next step

Other perfuming ingredients on these labels

Updated · The name, numbers and uses come from the European Commission’s CosIng entry (CC BY 4.0); we write the uses in US spelling and put the hair ones first. The labels are each maker’s own. The order rule is the FDA’s Cosmetics Labeling Guide. All our sources are on the Sources page.