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

At work I have to wipe tubing down prior to bending with prep-sol, and I wear rubber gloves the kind like you would use in the kitchen, and I have also used them with brake parts cleaner. But I clean the wheels on my nephews soap box derby car with brake parts cleaner and don't use gloves. I think the labels are funny that say"has been found to cause cancer in rats in California" What do I care if rats in California get cancer?