Description

1-Hydroxyethyl 4,5-diamino pyrazole sulfate. 1-Hydroxyethyl 4,5-diamino pyrazole sulfate is commonly used as a component of oxidative hair dyes. 2 This ingredient acts as a “precursor” and reacts with a “coupler.” In a typical formulation, a precursor is activated via an oxidant, such as peroxide.

1-Hydroxyethyl 4,5-diamino pyrazole sulfate is a key ingredient in hair color formulations. It’s used as a precursor in oxidative hair dyes, and is known for its ability to provide long-lasting color results.