Well you can put that big heavy copy of the CRC (http://www.crcpress.com/corphistory.asp) down. !Webbook is here, it's great! Research all your favorite chemicals, play w/ neat and interesting graph data for almost any chemical you can think of.

[Sweet. This makes me happy. The CRC books are freakin HUGE, so it will be nice to have on the internet.

Chemical Formula Search