THYMOL is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.
THYMOL
Safety grade: A
Thymol is a naturally occurring compound found in thyme and other plants that has a strong, minty-like aroma. It's commonly used in oral care products and traditional medicine for its antimicrobial properties.
In cosmetics, thymol acts as a preservative and antimicrobial agent, helps mask unpleasant odors, and is used in hair dye formulations to support color development and product stability.
Graded using: COSING, FDA.
Last verified: May 26, 2026
Other Hair Dyeing ingredients
- RESORCINOL — Grade E**
- M-AMINOPHENOL — Grade C**
- P-AMINOPHENOL — Grade C**
- 2-METHYLRESORCINOL — Grade C
- 4-AMINO-2-HYDROXYTOLUENE — Grade C
- P-PHENYLENEDIAMINE — Grade D**
- 2-METHYL-5-HYDROXYETHYLAMINOPHENOL — Grade C
- ULTRAMARINES — Grade A