There are literally millions of harmful chemicals. Could you please refine your question and ask again.
yes. All matter is 'chemicals' and some of them are harmful, so somematter does contain harmful chemicals.
A bath towel (normal and clean !) don't contain any harmful chemicals.
It depends on the chemicals.
some harmful chemicals that hide in toys are led, soap, and much much more
the most harmful is carbon dioxide.
yes it is but the chemicals will make it is harmful
maybe
There are several hundred harmful chemicals in cigarette smoke. The most notable are probably tar and nicotine.
Pool chemicals will be harmful to small children if ingested or if they come in contact with the skin at full strength. However, when used at proper levels in a pool they are not harmful. Pool chemicals in water are not harmful to children. Try to keep children from swallowing too much water though. Pool chemicals not stored correctly would be harmful to children, however!
Its obviously harmful because it has bad chemicals in it
Kill you or damage your body.
Diarreah