2-Isopentenal

INCI: 2-ISOPENTENAL

CAS Number
764-39-6 (also known as 2-pentenal/trans-2-pentenal) or potentially 3-methyl-2-butenal depending on isomer
Function
Fragrance ingredient
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted in fragrance compositions

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Reactive aldehyde with potential skin irritant properties; should comply with IFRA restriction levels at higher concentrations.

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Concern Level: Moderate

Regulatory Flags

fragrance-component

Frequently Asked Questions

Is 2-Isopentenal safe in cosmetics?

Reactive aldehyde with potential skin irritant properties; should comply with IFRA restriction levels at higher concentrations. The EU classifies 2-Isopentenal as "permitted". Safety rating: MODERATE.

Is 2-Isopentenal allowed in the EU?

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

What does 2-Isopentenal do in cosmetics?

2-Isopentenal functions as: Fragrance ingredient. It is classified as a cosmetic ingredient in our database. CAS number: 764-39-6 (also known as 2-pentenal/trans-2-pentenal) or potentially 3-methyl-2-butenal depending on isomer.

What is the Margin of Safety for 2-Isopentenal?

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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