Even though a laboratory may on the surface be clinically sterile, it could still be contaminated by VOCs coming from either sources within the laboratory, neighbouring rooms or even the surrounding area. There are many different VOCs that can be found in a laboratory, including ethanol and isopropanol alcohol.

Doctors, nurses as well as all the other healthcare workers and patients may be exposed to a wide range of chemicals emitted from various sources such as disinfectants and sterilitants (ethylene oxide, glutaraldehyde, formaldehyde, alcohols), anesthetic gases, (isoflurane and sevoflurane) laboratory or pharmaceutical products,