Arizona Barber Practice Exam

Calcium thioglycolate is the correct ingredient commonly found in depilatories because it functions as a chemical compound that effectively breaks down the protein structure of hair, making it easier to remove. Depilatories typically contain this ingredient due to its ability to dissolve the keratin in hair, resulting in a painless and efficient hair removal process. This is why it is popular in various hair removal products, leading to its widespread use in the beauty and personal care industry.

In contrast, the other options either serve different purposes or are not effective for hair removal. Calcium bentonite is a type of clay mainly used in skincare for its absorbent properties and is not involved in depilation. Calcium carbonate is primarily used as a calcium supplement or in antacids and does not have any hair removal properties. Sodium chloride, or table salt, is used as a preservative or to enhance flavor in products but does not play a role in the depilation process. Thus, calcium thioglycolate stands out as the key active ingredient in depilatories.