ChemSpiderChemSpider is a chemistry search engine. It has been built with the intention of aggregating and indexing chemical structures and their associated information into a single searchable repository and make it available to everybody, at no charge.
ChemSpider is a value-added offering of publicly available chemical structures since many additional properties have been added to each of the chemical structures. A quick browse of the user manual will help you to understand how ChemSpider can be of value.
