Why are many volatile organometallic compounds toxic?

Many organometallic compounds are highly toxic, particularly those that are volatile. While the specific mechanisms of toxicity can vary depending on the metal and the organic group involved, their volatility significantly increases the risk of exposure through inhalation, allowing these substances to enter the body and reach sensitive organs more easily.12

Once absorbed, many organometallic compounds—such as those containing mercury, lead, or tin—are known to cause severe damage to the nervous system, including the brain. For example, methylmercury is notoriously toxic to the developing brain and can cause permanent neurological damage. Other volatile compounds, such as tetracarbonylnickel, are also hazardous due to their chemical reactivity and potential for systemic toxicity.2341

Because these compounds can be absorbed through the skin or lungs, they pose significant occupational and environmental health risks. It is a fundamental ethical principle to prioritize human safety and environmental protection by implementing stringent controls on the handling, use, and disposal of these toxic substances to prevent exposure and contamination.234