Quote Originally Posted by Kirk Keyes View Post
There's a lot more hazardous things to worry about than the type of glycol used in a product... They are all so low in toxicity that it's a non-issue - for me. It's like worring about the differences in toxicity between KCl vs. NaCl.

Yes, I can agree to an extent.

I try to keep the entire facts before the audience though because not all of them are chemists as we are.

The issues of the type of glycol and the concentrations which cover a range of 6x from Photo Flo 200 - 1200 makes a big difference in work flow due to the need to make up stock solutions and juggle amounts used. The different glycols take different concentrations in their own right.

So, it is not straightforward.