sentence: Chromates can cause cancer.
sentences_before: Many chemicals are harmless, but there are some chemicals that are dangerous.
sentences_after: Hydrochloric acid can cause bad burns. Some chemicals like hydrogen can explode or catch fire. To stay safe, chemists experiment with chemicals in a chemical lab. They use special equipment and clothing to do reactions and keep the chemicals contained. The chemicals used in drugs and in things like bleach have been tested to make sure they are safe if used correctly.
concept_name: chromate
headings: Chemistry Safety