Chemspider
Site information
ChemSpider is a free online search service for chemistry scholars and practitioners that provides information on chemical structure formulas.
Highlights
**ChemSpider** is a free chemical structure database providing fast access to over 82 million structures and properties.
* **Highlights:**
* Search by chemical name, structure, formula, or other identifiers
* Get detailed information on chemical properties, spectra, and more
* Download structures in a variety of formats
* Collaborate with other users to share and discuss chemical data