There are many ways that chemistry is used in cosmetology, including testing the pH level of hair in order to make better product recommendations. Knowing the pH level helps cosmetologists dye hair the correct color and keeps them from damaging hair that they are treating.
Basic chemistry knowledge can help with other hair treatments as well, including curling or straightening. It also helps cosmetologists keep clients safe who may have allergies or sensitivities to specific substances, such as certain ingredients in artificial nails. This knowledge can help a cosmetologist prevent clients from having unwanted negative reactions.