This may be a FAQ, but I can't remember it being one ... Someone in my company came to me with a CAS Number and wanted to know its chemical name. Although we have a book of names and numbers it is only suitable for name to number (except in some lucky cases). I assumed it would be trivial to find a way of doing it on the WWW - but although I found a couple of sites that offered such lookup as a free service (and my thanks go to them), their databases were too small and didn't have my particular CAS Number. They were focussed on giving the data on the chemicals, and putting all that data on all those chemicals would be a Herculean task. But I'm not asking for a database which gives all the information on the chemical - all I want is CAS Number --> chemical name. I can do the rest myself. What is the legal status of CAS Numbers? I'd assumed that they were public property for the good of us all. So I assumed it was possible for anyone to get hold of a copy of the code so we can put it on our computers and swap easily between name and number. A simple ASCII table would be all one needs - bringing it into a simple database package would be trivial. Thanks Steve Steven Abbott steven@abbott.demon.co.uk http://www.autotype.com chemweb: A list for Chemical Applications of the Internet. Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To unsubscribe, send to majordomo@ic.ac.uk the following message; unsubscribe chemweb List coordinator, Henry Rzepa (rzepa@ic.ac.uk)