4-Ethylresorcinol

INCI: 4-ETHYLRESORCINOL

CAS Number
2896-60-8
Function
Antimicrobial, Hair Dyeing, Skin Conditioning (tyrosinase inhibitor / skin lightening)
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status prohibited
๐Ÿ‡บ๐Ÿ‡ธ US Status restricted
US Notes Not specifically restricted by FDA; used in OTC skin-lightening products (not monographed)

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
high
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Related compound resorcinol linked to thyroid disruption at high doses; classified as Skin Irrit. 2, Eye Irrit. 2, STOT SE 3 (respiratory); SCCS-assessed for hair dye use

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Concern Level: High

Frequently Asked Questions

Is 4-Ethylresorcinol safe in cosmetics?

Related compound resorcinol linked to thyroid disruption at high doses; classified as Skin Irrit. 2, Eye Irrit. 2, STOT SE 3 (respiratory); SCCS-assessed for hair dye use The EU classifies 4-Ethylresorcinol as "prohibited". Safety rating: MODERATE.

Is 4-Ethylresorcinol allowed in the EU?

4-Ethylresorcinol EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does 4-Ethylresorcinol do in cosmetics?

4-Ethylresorcinol functions as: Antimicrobial, Hair Dyeing, Skin Conditioning (tyrosinase inhibitor / skin lightening). It is classified as a cosmetic ingredient in our database. CAS number: 2896-60-8.

What is the Margin of Safety for 4-Ethylresorcinol?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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