A safe dose would knock somebody out for 15 to 20 minutes. Having to stand by Caylee's head administering safe drips of chloroform every 15 minutes would not give KC much of a night out.
That information about why chloroform was NOT used as a babysitter comes from the person owns the site KC visited 84 times (
http://www.thehinkymeter.com/phpbb/viewtopic.php?f=24&t=1232) and from a regular Hinky Meter poster, KZ who is an anesthesiologist.
15 to 20 minutes is plenty of time to keep a child out and lying still while...?
On the discussion part of the 84 times link supplied in the above paragraph I specifically asked the owner of the site if chloroform and neck breaking were recommended ways of humanely getting rid of animals. It
IS.
Back in 2008 when you googled chloroform the main use of chloroform that would come up was how to use it to euthanize animals. Same with neck breaking. I've posted many links to those sites here on Websleuths.