Looking for the ‘world’s best free online search engine for chemistry’? Well, look no further. ChemSpider is a structure-searchable database that aggregates and indexes chemical structures alongside associated information (curated literature data, chemical vendor catalogs, molecular properties, environmental data, toxicity data, analytical data etc) via a single repository.
Results are collated from a wealth of resources, both open access and commercially funded, and so it’s important to remember that you may not have access to all information collected during your search. Check the library holdings or contact me if you need help with getting hold of material.