Dermatitis and severe burns can occur with skin contact, and bronchitis can develop with chronic exposure. Poisons can cause systemic disease, or fatality. Consult the MSDS for other classes of chemicals. Most methods of detection rely on the observations of laboratory workers. Observation of vapors, particulates, and odor can alert workers to dangerous exposures.
Environmental monitoring is required for some chemicals such as formaldehyde.
Formaldehyde vapor monitors are available. Safe laboratory practices Read the MSDS for the chemicals you will be using. Know the location of emergency equipment. No food, drink, or application of cosmetics in laboratories. Do not mouth pipette.