If there is a spill of an unknown chemical, what is the first step you should take?

The correct first step in the event of a spill of an unknown chemical is to inform the lab instructor or teaching assistant. This is critical because the instructor or TA is trained to handle chemical spills safely and has the necessary knowledge of appropriate procedures for different types of chemicals. They can assess the situation, ensure that it is safe for others in the laboratory, and provide the appropriate cleanup measures needed to minimize any risk.

Informing the qualified personnel also ensures that proper protocols are followed, such as referring to Material Safety Data Sheets (MSDS) for specific chemicals, which detail the hazards associated with that substance and the recommended safety measures for cleanup. This action prioritizes everyone's safety and prevents potential health hazards that could arise from improperly handling an unknown chemical spill.

Doing anything else, such as attempting to clean it up independently or ignoring the spill, can increase the risk of exposure and accidents. It is essential to involve trained personnel to manage the situation correctly and maintain a safe laboratory environment.