Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations …

Chemistry, as a body of knowledge distinct from alchemy, became an established science with the work of Antoine Lavoisier, who developed a law of conservation of mass that demanded careful …

Balancing chemistry equations is a way of bringing order and honesty to the world of reactions. It is about noticing details, trusting the rules, and knowing that every atom counts. Whether you balance …

The chemistry archive contains legacy chemistry content, and is not being updated with new content. For our most up-to-date, mastery-enabled courses, check out Middle School Chemistry, High School …

5 days ago · Chemistry is the study of substances—that is, elements and compounds —while biology is the study of living things. However, these two branches of science meet in the discipline of …

Mastering supports the way chemistry students learn best: through engaging, immersive experiences.

ACS is one of the world’s largest scientific societies and the premier home of chemistry professionals. Find career opportunities, educational resources, professional development, and much more.