I got a health question regarding using some chemicals on our cars

So if you want an honest scientific answer, the MSDS should be readily downloadable from the manufacturer of any commercially available product. Follow the warning and instructions on the label. Use in a well ventilated area, Flammable, etc... Anything you can buy at your neighborhood parts house will be pretty mundane, especially in large populated areas (California and such). That said, if you DO react to a particular chemical by all means get proper PPE such as neoprene gloves and a NIOSH approved respirator.