The International Union of Pure & Applied Chemistry (IUPAC) has launched a new version of its InChI chemical identifier system- InChIKey. This condensed version can represent almost any chemical substance with a fixed string of just 25 characters and could make searching the web for specific compounds much simpler by preventing unpredictable line breaks and other problems with InChI strings of arbitrary length. IUPAC suggests that InChIKey will facilitate web-based chemistry lookup services and allow InChI to be stored in fixed length database fields and so make chemical structure database indexing far easier. It will also allow InChI strings to be verified easily across networks.
The Key to Simpler InChI