Which chemical is frequently used in hair relaxers?

Sodium hydroxide is frequently used in hair relaxers due to its effective ability to break the disulfide bonds in curly or wavy hair, allowing the hair to be restructured into a straighter form. This powerful alkaline chemical alters the hair's natural pH, making it easier to process and transform.

Sodium hydroxide is often referred to as lye, and it is known for its strength and efficiency in relaxing even tightly coiled hair. The application of sodium hydroxide in hair relaxers is a common practice, and stylists must be trained in its use to ensure the safety and satisfaction of clients.

While other chemicals like calcium hydroxide, potassium hydroxide, and ammonium thioglycolate have their own uses in hair care and treatments, they are not as widely recognized or utilized in traditional hair relaxers as sodium hydroxide. Each of these alternatives can serve different functions; for instance, ammonium thioglycolate is more commonly associated with permanent waving rather than relaxing hair.