Came across this regarding the Chlorine in Splenda on SplendaTruth.com
*Myth: SPLENDA® Brand Sweetener contains chlorine and, therefore, must be dangerous.
Fact: Chlorine is a natural part of salt, which is found in many foods, like lettuce, tomatoes, mushrooms, melons, and peanut butter, and is added to most public water supplies. Chlorine is also a part of more complex molecules found in such things as lentils, peas, and potatoes. It is a part of daily life.
In the case of SPLENDA® Brand Sweetener, chlorine is used in a process that alters sugar to create the very stable no-calorie sweetener, sucralose. A large amount of research shows that sucralose can be used safely by everyone and that there is no cause for concern about safety because of chlorine. What's more, SPLENDA® Brand Sweetener does not build up in the body, nor is it broken down to yield any free chlorine or smaller chlorinated molecules, and sucralose is calorie-free.*
So of course they claim it's harmless.