METHYL-METHYLPENTENYLCYCLOHEXENE-1-CARBALDEHYDE.

As a fragrance ingredient, METHYL-METHYLPENTENYLCYCLOHEXENE-1-CARBALDEHYDE is not typically an active compound for which dusting thresholds or red flags related to efficacy are assessed.

The Cosmetic Ingredient Review (CIR) Expert Panel has not specifically reviewed METHYL-METHYLPENTENYLCYCLOHEXENE-1-CARBALDEHYDE under its exact name. However, chemically similar fragrance aldehydes, such as 'Reaction mass of 3-(4-methyl-3-pentenyl)cyclohex-3-ene-1-carbaldehyde and 4-(4-methyl-3-pentenyl)cyclohex-3-ene-1-carbaldehyde' and '4-(4-Methyl-3-pentenyl)cyclohex-3-ene-1-carbaldehyde' (Myrac aldehyde), are classified with hazard statements indicating potential for 'Causes skin irritation' (H315) and 'May cause an allergic skin reaction' (H317). For related isomers, the Research Institute for Fragrance Materials (RIFM) has determined a No Expected Sensitization Induction Level (NESIL) of 5900 μg/cm². The International Fragrance Association (IFRA) sets maximum concentration levels for various product categories for similar dimethylcyclohexen-3-ene-1-carbaldehyde isomers, ranging from 0.64% to 18%, considering dermal sensitization and systemic toxicity. The Scientific Committee on Consumer Safety (SCCS) has previously deemed certain fragrance aldehydes (e.g., Hydroxyisohexyl 3-cyclohexene carboxaldehyde) unsafe at typical use levels due to contact allergy concerns, highlighting a broader risk within this chemical class. The ingredient is listed by the FDA as a fragrance in consumer products, not as a drug or active cosmetic ingredient.