4-BUTYL-5-METHYLTHIAZOLE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

4-BUTYL-5-METHYLTHIAZOLE

Safety grade: A

This is a synthetic aromatic compound that produces a distinctive scent, often described as nutty, roasted, or savory in character. It is used in very small amounts as a fragrance ingredient in cosmetic and personal care products.

It is used in cosmetic products solely to add or enhance a specific fragrance note, contributing to the overall scent profile of the product.

Graded using: COSING.

Last verified: May 26, 2026