What is one primary use of formaldehyde in esthetics?

Formaldehyde is primarily used as a disinfectant in esthetics due to its antimicrobial properties. This compound is effective at killing bacteria, viruses, and fungi, making it valuable in salon and spa settings where maintaining a clean and sanitary environment is crucial. It is commonly utilized in the sterilization of instruments and surfaces to prevent the spread of infections and ensure the safety of both clients and practitioners. Its use as a disinfectant supports the overall health standards required in esthetics practices.

The other options do not accurately reflect formaldehyde's primary uses in esthetics. For example, while skin healing and hydration are essential aspects of skin care, formaldehyde does not play a role in these processes. Additionally, it is not used as a blood thinner; that function pertains to specific medications rather than cosmetic or aesthetic applications. Understanding the correct application of formaldehyde highlights its significance in promoting hygiene and safety in esthetics.