What should a phlebotomist reference for handling an unfamiliar chemical in the laboratory?

The most appropriate reference for handling an unfamiliar chemical in the laboratory is the Material Safety Data Sheet (MSDS). The MSDS provides comprehensive information about the chemical, including its properties, hazards, handling and storage requirements, first-aid measures, and emergency procedures. It is specifically designed to inform users of the potential risks associated with the chemical and the best practices for safe handling.

Utilizing the MSDS ensures that phlebotomists and other laboratory personnel can make informed decisions about personal protective equipment (PPE), exposure limits, and specific measures that should be taken in case of spills or exposure. This resource is crucial for maintaining safety standards and compliance with regulations in the laboratory environment.

Other options such as a safety handbook, user manual, and research articles may contain some relevant information, but they do not provide the detailed safety and handling information that is specifically tailored to hazardous materials as comprehensively as the MSDS does. Therefore, when encountering an unfamiliar chemical, referencing the MSDS is the best practice to ensure safety and proper handling.