Remember the BP oil spill? The Corexit that BP used to “disperse” the oil can make it tougher for microbes to digest the oil. And, added bonus, it can get sucked up by human skin.
COREXIT was used even though EPA-approved alternatives showed to be far less toxic and, in some cases, nearly twice as effective. COREXIT 9527 was replaced by COREXIT 9500 after the former was deemed unacceptably toxic but only after extensive use. According to BP 1,800,000 gallons of COREXIT went into the Gulf of Mexico but the validity of those numbers is in question.
Propylene glycol, one of its ingredients, increases the body’s chemical absorption through the skin. Which is probably the cause of the effect that you see in the pictures.
The safety data sheets for Corexit also warn of possible kidney, nervous system, and intestinal problems. Here you can find the Medical Safety Data Sheets for both versions.
This dirty mess is far from being over.