Moderate Cosmetic Ingredient NOAEL Data SCCS/CIR Reviewed

2-Methylresorcinol ⭐ (Most extensively assessed)

INCI: 2-METHYLRESORCINOL

CAS Number
608-25-3
Function
Hair dye (oxidative and non-oxidative formulations)
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status prohibited
EU Max Conc. 1.8%
🇺🇸 US Status permitted
US Notes Permitted; CIR reviewed. Coal tar hair dye exemption applies under FD&C Act Section 601(a)

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

2 study endpoints found for 2-Methylresorcinol ⭐ (Most extensively assessed). NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
LOAEL 100 mg/kg bw/day oral rat Subchronic COSMOS_DB
NOAEL 100 mg/kg bw/day oral rat oral REACH

Safety Opinions

Official safety assessments from the Scientific Committee on Consumer Safety (SCCS) and Cosmetic Ingredient Review (CIR).

cir Number 3, 1986
Verdict: unknown

Expert Verdict

Clastogenic in vitro (chromosome aberrations in V79 cells ± S9) but negative in vivo micronucleus. Severely irritating to rabbit eye when undiluted (ocular corrosion). Acute oral LD50 very low: 390 mg/kg bw in mice. Not for use outside hair dye applications.

⚠️
Concern Level: Moderate

Regulatory Flags

eu_cosing_listed

Frequently Asked Questions

Is 2-Methylresorcinol ⭐ (Most extensively assessed) safe in cosmetics?

Clastogenic in vitro (chromosome aberrations in V79 cells ± S9) but negative in vivo micronucleus. Severely irritating to rabbit eye when undiluted (ocular corrosion). Acute oral LD50 very low: 390 mg/kg bw in mice. Not for use outside hair dye applications. The EU classifies 2-Methylresorcinol ⭐ (Most extensively assessed) as "prohibited". Safety rating: MODERATE. 2 toxicological study endpoint(s) are available in our database. This ingredient has been reviewed by cir.

Is 2-Methylresorcinol ⭐ (Most extensively assessed) allowed in the EU?

2-Methylresorcinol ⭐ (Most extensively assessed) EU regulatory status: prohibited. Maximum allowed concentration: 1.8%. This is based on EU Regulation 1223/2009 and its amendments.

What does 2-Methylresorcinol ⭐ (Most extensively assessed) do in cosmetics?

2-Methylresorcinol ⭐ (Most extensively assessed) functions as: Hair dye (oxidative and non-oxidative formulations). It is classified as a cosmetic ingredient in our database. CAS number: 608-25-3.

What is the Margin of Safety for 2-Methylresorcinol ⭐ (Most extensively assessed)?

adequate 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.

What is the NOAEL for 2-Methylresorcinol ⭐ (Most extensively assessed)?

The NOAEL (No Observed Adverse Effect Level) for 2-Methylresorcinol ⭐ (Most extensively assessed) is 100 mg/kg bw/day based on a Subchronic study via oral route in rat. A total of 2 study endpoints are available. Source: COSMOS_DB.

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