Skip to content

4-TERT-BUTYLCYCLOHEXANE CARBALDEHYDE

CAS 20691-52-5
63

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A cycloaliphatic aldehyde fragrance with a fresh, citrus, green scent profile, classified as an EU fragrance allergen requiring declaration.

4-tert-Butylcyclohexane carbaldehyde is a cycloaliphatic aldehyde that provides fresh, citrus, and green odor notes to fragrance compositions. The branched tert-butyl group on the cyclohexane ring creates steric hindrance affecting its reactivity. It is identified in EU Regulation 1223/2009 Annex III as a fragrance allergen requiring mandatory declaration on cosmetic ingredient lists when present above threshold concentrations.

Skin benefits

  • Provides fresh, citrus-green fragrance notes
  • Used in perfumes for its aldehydic freshness
  • Blends well with floral fragrance compositions

Known concerns

  • EU declared fragrance allergen requiring label declaration
  • Potential for skin sensitization in susceptible individuals
  • Aldehyde - can react with skin proteins to form sensitizers
  • Generally safe at normal fragrance use levels

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Check your shelf

Find 4-TERT-BUTYLCYCLOHEXANE CARBALDEHYDE in your products.

Scan any cosmetic product with LuxSense to see if it contains 4-TERT-BUTYLCYCLOHEXANE CARBALDEHYDE and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.