Its not dangerous.
If they have just swallowed chemical, whether known or unknown your best bet would be to call posion control and/or take them to the emergency room at your nearest hospital. Don't induce vomiting or make them drink anything like water or milk unless told other wise by posion control.
call 911
A Noob giving first aid is dangerous. If you don't know what your doing. DONT DO IT!
Uh, try not to in the first place, but if you do find yourself sitting around drinking dangerous household chemicals, go to the hospital or poison control center immediately. Ingestion of different chemicals requires specific treatment for each kind of chemical.
Getting a tattoo while pregnant can be very risky. The chemicals in the ink can affect your baby during the first 12 weeks of pregnancy. The chemicals can be dangerous to the fetus.
Esophagus
All matter is made up of chemicals. Oxygen and water are chemicals. There are millions of different chemicals in the human body. Vitamin D3 is a chemical but it is also used as a rat poison. The first rule of toxicology is that it's the dose, not the toxin. ALL chemicals are dangerous, or even lethal, in the appropriate dose. And the opposite applies too. Try Googling "botox" and "botulinum".
when a dic got swallowed
He ate his eldest child.
It is not usually recommended to give any pet medicine intended for humans unless you have checked with a vet first. Plus if your dog has swallowed something that could potentially get stuck this is very dangerous and you should seek veterinary advice immediately!
If they ingested caustic chemicals, giving them ipecac so they throw up can cause greater damage to the esophagus. Better for you should call your local emergency number (such as 911) or the National Poison Control Center at 1-800-222-1222. They may advise you to give the person water or milk if they are not experiencing symptoms of vomiting or seizures.
Because if another person were to come in contact with the chemicals, then they would be harmed as well.