Final answer:
It is true that secondary containers containing chemicals need to be labeled with the contents for safety reasons, including details such as flammability and environmental hazards. Labels include a hazard or fire diamond for quick hazard identification.
Step-by-step explanation:
It is true that any secondary container with chemicals must be labeled to properly identify the contents. This labeling is crucial for safety reasons, as it ensures that anyone using or coming in contact with the container is aware of its contents and can handle it correctly. Labels often include the hazard diamond or fire diamond, which provides a quick reference to the hazards associated with the substance, including flammability, reactivity, health risks, and special instructions about environmental hazards such as the presence of CFCs (chlorofluorocarbons). When working in a laboratory, following safety instructions meticulously is essential. This includes understanding labels, using fume hoods when dealing with harmful vapors, avoiding the inhalation of fumes, handling flammable chemicals with caution, especially near an open flame or heat source, ensuring all chemical containers are sealed after use, and turning off Bunsen burners or other heat sources at the end of a practical session.