5-NONEN-2-ONE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

5-NONEN-2-ONE

Safety grade: A

5-Nonen-2-one is a synthetic fragrance chemical that has a fresh, fruity, or floral scent. It is used in very small amounts as part of a product's fragrance blend.

This ingredient is used in cosmetic products solely to add or enhance a pleasant scent.

Graded using: COSING.

Last verified: May 26, 2026