I know a lot of people, like me, have been wondering what exactly the dispersant is which BP is using on the oil spill. I just got this info. on what it might be:
BP has been injecting the Corexit 9500 dispersant into the blowout at
depth. This apparently creates a better mix with the oil as it rises.
We are learning that the chemical was tested by the EPA and proven to
be less effective and more toxic than other available dispersant.
Corexit's manufacturer Nalco is stepping up production to supply more
Nalco does share a few board members with BP.
Here is the MSDS data on Corexit 9500:
And here are some pertinent links as provided by an AZ peep: