Why? you ask. While information in WISER is derived from the peer-review Hazardous Substances Data Bank, and we have conducted a verification process, as more research is conducted updates to substances' data may be made. We would like to be able to inform you of important changes in the data; some of those changes may be critical for the safe use of the information. If you choose not to give us your email address, you can still download and use WISER but you will not receive notification of updates. We will not release your email address for any other purpose and we assure you that any email we send will be infrequent and concise.