Isohexenyl Cyclopentenyl Carbaldehyde

INCI: ISOHEXENYL CYCLOPENTENYL CARBALDEHYDE

CAS Number
Not confirmed from verified sources (note: do not confuse with isohexenyl cyclohexenyl carboxaldehyde, CAS 37677-14-8, or with HICC/Lyral, CAS 31906-04-4, which is EU-banned)
Function
Fragrance (perfuming)
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status prohibited
🇺🇸 US Status permitted
US Notes Allowed under general fragrance use - no specific prohibition identified, but IFRA restrictions may apply

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.

Expert Verdict

Critical caution - fragrance aldehydes in this structural family (cyclohexenyl/cyclopentenyl carbaldehyde derivatives) have known sensitization potential. HICC (the cyclohexene analog with hydroxyl group) was banned precisely for sensitization. Thorough RIFM safety assessment and IFRA compliance verification are mandatory before use. A terpenic aldehyde with a floral/muguet-type scent profile. The cyclopentenyl ring differentiates it structurally from the cyclohexenyl analogs. Verify current ...

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Concern Level: High

Regulatory Flags

potential-allergen fragrance-component

Frequently Asked Questions

Is Isohexenyl Cyclopentenyl Carbaldehyde safe in cosmetics?

Critical caution - fragrance aldehydes in this structural family (cyclohexenyl/cyclopentenyl carbaldehyde derivatives) have known sensitization potential. HICC (the cyclohexene analog with hydroxyl group) was banned precisely for sensitization. Thorough RIFM safety assessment and IFRA compliance verification are mandatory before use. A terpenic aldehyde with a floral/muguet-type scent profile. The cyclopentenyl ring differentiates it structurally from the cyclohexenyl analogs. Verify current ... The EU classifies Isohexenyl Cyclopentenyl Carbaldehyde as "prohibited". Safety rating: MODERATE.

Is Isohexenyl Cyclopentenyl Carbaldehyde allowed in the EU?

Isohexenyl Cyclopentenyl Carbaldehyde EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does Isohexenyl Cyclopentenyl Carbaldehyde do in cosmetics?

Isohexenyl Cyclopentenyl Carbaldehyde functions as: Fragrance (perfuming). It is classified as a cosmetic ingredient in our database. CAS number: Not confirmed from verified sources (note: do not confuse with isohexenyl cyclohexenyl carboxaldehyde, CAS 37677-14-8, or with HICC/Lyral, CAS 31906-04-4, which is EU-banned).

What is the Margin of Safety for Isohexenyl Cyclopentenyl Carbaldehyde?

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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