PLDEFRESITJęzyk: polski
INCI name

P-HYDROXYANISOLE

p-Hydroxyanisole (4-methoxyphenol)

AntioxidantReducingreviewed

A phenolic antioxidant regulated in Annex III for artificial nail systems.

What it is

p-Hydroxyanisole is 4-methoxyphenol, also known as mequinol, a simple phenol derivative. CosIng lists it as an antioxidant and reducing agent. In the EU it is covered by an entry in Annex III (substances subject to restrictions) for artificial nail systems intended for professional use, with label warnings.

Where it is used

Found in artificial nail systems such as acrylic nail products used in nail salons.

Limits of interpretation

The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.

See the EU regulation section for the applicable limits, conditions and warnings. According to the Annex III entry, its use is tied to artificial nail systems for professional use.

Functions

Antioxidant
Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
Reducing
Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).

EU regulation

EU · Annex III, entry 95Hydroquinone methylether / Mequinol
Product type
Artificial nail systems
Maximum concentration
0.02% (after mixing for use)
Conditions and warnings
For professional use only Avoid skin contact Read directions for use carefully
As of
3 November 2026 · (EC) 2009/1223

Safety Gate alerts (EU)

8 alerts about dangerous cosmetics in the EU mention this substance. An alert concerns a specific product, usually one that breaks EU rules.

See all alerts →

Products with this ingredient (202)

Check a full ingredient list