"Safer chemicals" refers to substances that are less likely to harm human health or the environment compared to other chemicals. They are designed or chosen to reduce risks and potential negative effects. Full definition
Just one more reason substitution of safer chemicals is always a good idea. (treehugger.com)
You have to make sure that the mattress is safe chemical free and made from non-toxic material that can be harmful for your child. (bestcribmattressreviews.com)
It means this stuff is made with safer chemicals. (geekwrapped.com)