Which active ingredient in a relaxer has a pH of 9.6-10.0?

The active ingredient in a relaxer that has a pH of 9.6-10.0 is ammonium thioglycolate. This ingredient is a common component in hair relaxers and perms, primarily used for chemically altering the structure of hair. The alkaline pH is crucial because it helps to swell the hair cuticle, allowing the relaxer to penetrate the hair shaft and break down the disulfide bonds within the hair, which are responsible for its natural curl or wave.

Ammonium thioglycolate works effectively within this pH range, making it a popular choice for those seeking softer, more manageable hair with relaxed curls. Its compatibility with the hair's structure and its ability to create long-lasting results contribute to its effectiveness in the relaxing process.

Other potential ingredients listed do not fall within the same pH range and are not considered correct in this context. For instance, sodium hydroxide has a much higher pH, making it more caustic and suitable for a different type of relaxer. Understanding the chemical properties and pH levels of these ingredients is essential for safe and effective use in hair treatment processes.