4-Ethylresorcinol ●
TL;DR. This ingredient is a pigment-targeting active used to visibly reduce uneven tone by inhibiting tyrosinase, a key enzyme in melanin production. It may also contribute mild antioxidant support in leave-on formulas.
What does 4-Ethylresorcinol do in a cosmetic formula?
This ingredient is a pigment-targeting active used to visibly reduce uneven tone by inhibiting tyrosinase, a key enzyme in melanin production. It may also contribute mild antioxidant support in leave-on formulas.
Is 4-Ethylresorcinol clean?
It has clean-beauty friction because it is a synthetic pigment-active phenolic with possible irritation or sensitization at higher exposure. Some restricted-list programs treat related brightening phenolics conservatively, so use level and skin tolerance matter.
Is 4-Ethylresorcinol sustainable?
This material is typically synthetic and not a renewable-leaning botanical or mineral ingredient. It is not known as a bioaccumulative silicone-type material, but its sourcing and manufacture are less aligned with low-impact green chemistry than simple biodegradable plant-derived ingredients.
Is 4-Ethylresorcinol COSMOS-approved?
It is not a good fit for COSMOS-natural or COSMOS-organic standards as a synthetic specialty active. From a Green Chemistry view, the main drawbacks are nonrenewable feedstock reliance and a more complex synthesis, while the small use levels reduce total formula load.
How does 4-Ethylresorcinol work chemically?
The molecule is a substituted diphenolic aromatic compound, and its activity is tied to interaction with copper-dependent tyrosinase in the pigment pathway. It is generally used at low leave-on levels, often around tenths of a percent, and formulators manage pH, oxidation, and compatibility with other actives to preserve performance and skin tolerance.
Last updated 2026-05-16