Which solvent category is typically avoided due to higher toxicity?

Aromatic hydrocarbons are the correct answer because they are known to have higher toxicity compared to other solvent categories. This toxicity often makes them a concern for health and safety during exposure. For instance, compounds like benzene, toluene, and xylene fall into this category and are associated with adverse health effects, including neurotoxicity and potential carcinogenicity.

When working with solvents, it is crucial to prioritize safety by selecting those that minimize harmful exposure. Aliphatic hydrocarbons, naphthenic hydrocarbons, and petroleum hydrocarbons are generally less toxic and are therefore more commonly used in applications that require solvents. This distinction highlights the importance of understanding solvent properties in the painting industry, particularly concerning worker safety and compliance with regulations.