🏛️ ACS — American Chemical Society
The world's largest scientific society — resources and education for chemistry students.
acs.org →NIST Chemistry WebBook
National Institute of Standards and Technology — chemical data and reference materials.
webbook.nist.gov →Royal Society of Chemistry
International chemistry organization with extensive educational resources.
rsc.org →ChemSpider
Free chemical structure database with over 100 million structures.
chemspider.com →Khan Academy Chemistry
Free comprehensive chemistry courses from basic to AP level.
khanacademy.org →EPA Chemistry Resources
US Environmental Protection Agency — chemistry and environmental science resources.
epa.gov →