Which nerve agent is characterized as being the most persistent and oily, remaining active for several days?

The nerve agent that is most recognized for its persistence and oily characteristics is VX. VX is a synthetic compound that is known for its high toxicity and stability in various environmental conditions, which allows it to remain active on surfaces for several days. Its oily nature makes it particularly hazardous because it can easily adhere to surfaces and clothing, posing a longer-term risk to individuals who come into contact with it.

In contrast, Sarin is a highly volatile nerve agent that evaporates quickly, making it less persistent than VX. Tabun is also a nerve agent that is more volatile than VX, and while it has some level of persistence, it does not match the duration of threat that VX presents. Novichok agents vary widely in their formulation and characteristics, but many are designed to be more potent or complex rather than exceptionally persistent like VX.

Understanding the properties of nerve agents is crucial for medical personnel and first responders as it guides their protective measures and decontamination procedures in the event of exposure. The longer persistence of VX makes it a significant concern in terms of contamination and public safety following a chemical incident.