How many symbols are included in the GHS?

The correct answer is based on the Global Harmonized System (GHS) of Classification and Labeling of Chemicals which includes a total of nine symbols. These symbols are designed to convey specific hazards associated with chemical substances and mixtures, making it easier for users to understand the potential dangers without relying solely on text. Each symbol corresponds to a different hazard category, such as toxicity, corrosiveness, or flammability, and helps ensure that information about chemical hazards is communicated consistently across different materials and products.

Understanding these symbols is crucial for those who work with chemicals, as they provide quick, visual cues about the serious nature of certain materials, prompting appropriate safety measures and precautions. This structured approach to hazard communication is central to the GHS, as it aims to improve safety in workplaces, transportation, and during consumer use.

The other options referencing fewer or more symbols than nine do not accurately represent the recognized framework of the GHS, leading to potential misunderstandings regarding chemical safety. Knowledge of the exact number of symbols can aid individuals in identifying and responding to chemical hazards effectively.