Moderate Cosmetic Ingredient NOAEL Data

Isopropyl Phenylacetaldehyde

INCI: ISOPROPYL PHENYLACETALDEHYDE (ALSO LISTED AS AR-ISOPROPYLPHENYLACETALDEHYDE)

CAS Number
4395-92-0
Function
Fragrance (perfuming agent); declared as "PARFUM" on product labels
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status restricted
EU Max Conc. 0.004%
🇺🇸 US Status permitted
US Notes Allowed - listed in the FDA Substances Added to Food (formerly EAFUS) database; no specific prohibition for cosmetic use

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

2 study endpoints found for Isopropyl Phenylacetaldehyde. 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 19 mg/kg bw/day oral rat Subchronic COSMOS_DB
dose_tested 19 mg/kg bw/day oral rat Subchronic COSMOS_DB

Expert Verdict

RIFM safety assessment identifies it as a potential skin sensitizer (NESIL 1100 µg/cm²); Cramer Class I toxicity; not expected to be genotoxic or photoirritating/photoallergenic based on UV/Vis spectra and read-across data. Subchronic reference dose of 0.045 mg/kg/day; predicted dermal absorption of 80%; subject to Quantitative Risk Assessment (QRA2) for IFRA compliance

⚠️
Concern Level: High

Regulatory Flags

potential-allergen fragrance-component ifra_fragrance fda_food_additive

Frequently Asked Questions

Is Isopropyl Phenylacetaldehyde safe in cosmetics?

RIFM safety assessment identifies it as a potential skin sensitizer (NESIL 1100 µg/cm²); Cramer Class I toxicity; not expected to be genotoxic or photoirritating/photoallergenic based on UV/Vis spectra and read-across data. Subchronic reference dose of 0.045 mg/kg/day; predicted dermal absorption of 80%; subject to Quantitative Risk Assessment (QRA2) for IFRA compliance The EU classifies Isopropyl Phenylacetaldehyde as "restricted". Safety rating: MODERATE. 2 toxicological study endpoint(s) are available in our database.

Is Isopropyl Phenylacetaldehyde allowed in the EU?

Isopropyl Phenylacetaldehyde EU regulatory status: restricted. Maximum allowed concentration: 0.004%. This is based on EU Regulation 1223/2009 and its amendments.

What does Isopropyl Phenylacetaldehyde do in cosmetics?

Isopropyl Phenylacetaldehyde functions as: Fragrance (perfuming agent); declared as "PARFUM" on product labels. It is classified as a cosmetic ingredient in our database. CAS number: 4395-92-0.

What is the Margin of Safety for Isopropyl Phenylacetaldehyde?

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.

What is the NOAEL for Isopropyl Phenylacetaldehyde?

The NOAEL (No Observed Adverse Effect Level) for Isopropyl Phenylacetaldehyde is 19 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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