ACETALDEHYDE is graded F** (Banned) by Expert·ING, based on COSING regulatory data. It is restricted under EU COSING — AnnexII.
ACETALDEHYDE
Safety grade: F**
Acetaldehyde is a volatile organic compound that occurs naturally in small amounts in fermented foods and beverages. In cosmetics, it is used in very small concentrations for specific purposes.
This ingredient is used to mask unpleasant odors in nail products and to help condition and strengthen nails.
Graded using: COSING.
- EU COSING — Prohibited
- Sephora Clean — Prohibited
Last verified: June 7, 2026
Safer alternatives to ACETALDEHYDE
- 2-METHYLPROPANAL — Grade A**. Aldehyde compound that masks odors in nail products similarly.
- AMP-ISOSTEAROYL HYDROLYZED SILK — Grade B. Hydrolyzed protein conditions and strengthens nails effectively.
Other CMR Substance ingredients
- CYCLOMETHICONE — Grade F**
- PETROLEUM — Grade F
- FORMALDEHYDE — Grade F
- STYRENE — Grade F**
- TETRAHYDROFURFURYL ALCOHOL — Grade F**
- CHLOROACETAMIDE — Grade F**
Other Nail Conditioning ingredients
- COMMIPHORA MYRRHA RESIN EXTRACT — Grade A
- ECHINACEA ANGUSTIFOLIA ROOT EXTRACT — Grade A
- VACCINIUM MYRTILLUS LEAF EXTRACT — Grade A
- 4,4'-ISOPROPYLIDENEDIPHENYL/EPICHLOROHYDRIN COPOLYMER DIACRYLATE — Grade A
- ACRYLIC ACID — Grade A**
- ANGELICA FURCIJUGA FLOWER/LEAF/STEM EXTRACT — Grade A