Final answer:
The skull and crossbones symbol on the disinfectant label indicates a hazardous nature, serving as a warning to the user.
Step-by-step explanation:
The skull and crossbones symbol on the label of the disinfectant indicates a hazardous nature. It is used to communicate the potential dangers associated with the product, such as toxicity, corrosiveness, or environmental hazards. The symbol serves as a warning to the user to handle the disinfectant with caution and follow safety protocols.