Where in cosmetic chemistry are Sodium Laurel Sulfate and Ammonium Laurel Sulfate found?

Sodium Laurel Sulfate and Ammonium Laurel Sulfate are classified as surfactants due to their role in reducing surface tension between different substances, which enhances the ability of products to spread, foam, and cleanse. Surfactants are key components in many cosmetic and personal care products, especially in formulations like shampoos, body washes, and facial cleansers, because they help to emulsify oils and dirt, allowing them to be rinsed away easily. Their ability to generate foam is particularly valuable in products where lathering is desired, contributing to the sensory experience of cleansing.

The other options describe different categories of ingredients. Preservatives serve to prolong the shelf life of products by preventing microbial growth, emollients are used to soften and smooth the skin, and thickeners adjust the viscosity of formulations. None of these categories accurately encompass the primary function of Sodium Laurel Sulfate and Ammonium Laurel Sulfate, which is to act as surfactants.