Moderate Cosmetic Ingredient NOAEL Data

Guaiacol

INCI: GUAIACOL

CAS Number
90-05-1
Function
Fragrance ingredient, denaturant
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” FEMA GRAS; FDA 21 CFR 172.515 (food flavoring); no cosmetic-specific restriction

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

7 study endpoints found for Guaiacol. 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
NOAEL 750 mg/kg bw/day oral rat Chronic COSMOS_DB
NOAEL 42 mg/kg bw/day oral rat Special Toxicology Study COSMOS_DB
NOAEL 2000 mg/kg bw/day oral rat Short Term Toxicity COSMOS_DB
dose_tested 42 mg/kg bw/day oral rat Special Toxicology Study COSMOS_DB
NOAEL 1500 mg/kg bw/day oral rat oral REACH
NOAEL >42.12 mg/kg bw/day oral rat oral REACH
NOAEL 240 mg/kg bw/day oral rat oral REACH

Expert Verdict

GHS: H302 (harmful if swallowed), H315 (skin irritation), H319 (eye irritation); rabbit dermal LD50 4,600 mg/kg; Cramer Class I; RIFM assessment confirms safe under declared fragrance use levels

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Concern Level: Moderate

Regulatory Flags

fragrance-component ifra_fragrance fda_food_additive jecfa_safe

Frequently Asked Questions

Is Guaiacol safe in cosmetics?

GHS: H302 (harmful if swallowed), H315 (skin irritation), H319 (eye irritation); rabbit dermal LD50 4,600 mg/kg; Cramer Class I; RIFM assessment confirms safe under declared fragrance use levels The EU classifies Guaiacol as "permitted". Safety rating: MODERATE. 7 toxicological study endpoint(s) are available in our database.

Is Guaiacol allowed in the EU?

Guaiacol EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Guaiacol do in cosmetics?

Guaiacol functions as: Fragrance ingredient, denaturant. It is classified as a cosmetic ingredient in our database. CAS number: 90-05-1.

What is the Margin of Safety for Guaiacol?

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 Guaiacol?

The NOAEL (No Observed Adverse Effect Level) for Guaiacol is 750 mg/kg bw/day based on a Chronic study via oral route in rat. A total of 7 study endpoints are available. Source: COSMOS_DB.

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