• Jul 13, 2025 2 4 Dimethylpentane Structural Formula ompared to straight-chain isomers. 3. Is 2,4-dimethylpentane toxic? While not acutely toxic, inhalation of high concentrations can cause respiratory irritation. As with any chemical, proper handling and safety precautions are necessary. 4. What are some other isomers of dimethylpentane? T BY Frances Kuhn