Presto: Corexit® dispersant ingredients revealed

Richard Denison, Ph.D., is a Senior Scientist.

With no fanfare whatsoever, a list of the ingredients in the Corexit® dispersants has been posted on EPA’s website.  I can’t say when the list appeared — I was pointed to it by Elana Schor, a reporter with E&E News, who discovered the list a little earlier today, buried well down on the agency’s dispersants page.

The components of COREXIT® 9500 and 9527 are:

CAS Registry NumberChemical Name
57-55-61,2-Propanediol
111-76-2Ethanol, 2-butoxy-
577-11-7Butanedioic acid, 2-sulfo-, 1,4-bis(2-ethylhexyl) ester, sodium salt (1:1)
1338-43-8Sorbitan, mono-(9Z)-9-octadecenoate
9005-65-6Sorbitan, mono-(9Z)-9-octadecenoate, poly(oxy-1,2-ethanediyl) derivs.
9005-70-3Sorbitan, tri-(9Z)-9-octadecenoate, poly(oxy-1,2-ethanediyl) derivs
29911-28-22-Propanol, 1-(2-butoxy-1-methylethoxy)-
64742-47-8Distillates (petroleum), hydrotreated light

More to come.

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