What colorless gas is used in haircolor to aid in the oxidation process?

The colorless gas that aids in the oxidation process in hair coloring is ammonia. In hair coloring formulations, ammonia plays a vital role as an alkaline compound that helps open the hair cuticle, allowing the color to penetrate the hair shaft. It works in conjunction with the oxidation agent, typically hydrogen peroxide, which is responsible for the actual color development and lightening process.

While oxygen is essential in the overall chemistry of oxidation, it is not directly used in hair coloring applications in the same way that ammonia is. Chlorine and carbon dioxide do not serve this purpose and neither are incorporated in hair color formulations to facilitate the oxidation process as ammonia does. Understanding the role of ammonia helps clarify its importance in achieving effective hair coloring results.