Final answer:
A spray bottle containing toxic material must be labeled with its contents for safety. This ensures that the nature of the contents is clear, promoting correct handling and preventing accidents.
Step-by-step explanation:
When dealing with a spray bottle containing poisonous or toxic material from a larger container, it is imperative to follow specific safety protocols. According to general laboratory safety guidelines, the correct answer to the question – “A spray bottle containing a poisonous or toxic material that was originally taken from a 5-gallon container must:” is that it must be labeled with its contents. This is essential to ensure that everyone who may come into contact with the bottle is aware of its hazardous contents and can handle it accordingly. It is also important to follow your teacher's instructions carefully on how to handle flammable chemicals and be aware of procedures for dealing with chemical spills, disposal of waste, and potential fumes that may be harmful if inhaled.