American Chemical Society

ACS is the world’s largest scientific society and the premier home of chemistry professionals. Find career opportunities, educational resources and more.

The Royal Society of Chemistry

Advancing excellence, connecting chemical scientists and shaping the future of the chemical sciences for the benefit of humanity.

IIS7

Empowering Innovation & Scientific Discoveries | CAS

CAS provides products and services that help empower scientific discoveries. Learn how CAS can facilitate your research and drive innovation.

Dynamic Periodic Table

Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions from...

Main menu of a site aimed to help advanced level chemistry students to...

chemguide: helping you to understand Chemistry - Main Menu

ChemSpider | Search and share chemistry

ChemSpider is a free chemical structure database providing fast access to over 34 million structures, properties and associated information.

Chemical Portal - Chemistry Online Education

Chemical portal: a place for chemistry enthusiasts and professionals alike. Chemistry tools, periodic table, unit converters and more.

Organic Chemistry Portal

The Organic Chemistry Portal offers an overview of recent topics, interesting reactions and information on important chemicals for organic chemists.

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What's New at Science Notes - Periodic Tables and More - Science Notes...

Are you wondering what's new and what we're working on at Science Notes? Here's a running update.

Master Organic Chemistry - An Online Organic Chemistry Resource

400+ free articles on undergraduate organic chemistry topics plus free (and paid) study guides, a reaction encyclopedia, practice problems, tutoring & more.