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Corexit 9500 was designed to replace Corexit 9527. In 2002, Corexit 9527 and Corexit 9500 were the only two chemical dispersants stockpiled in large quantities in the U.S.A. [ 15 ] An estimated 2.5 million gallons of chemicals were used in response to the supertanker SS Torrey Canyon oil spill in the United Kingdom in 1967 . [ 16 ]
The primary dispersant used were Corexit 9527 and 9500, which were controversial due to toxicity. In 2012, a study found that Corexit made the oil up to 52 times more toxic than oil alone, [ 12 ] and that the dispersant's emulsifying effect makes oil droplets more bio-available to plankton . [ 13 ]
Toxicologist and marine biologist Riki Ott has also spoken on the toxicity of the spilled crude oil and of the dispersant Corexit, "The dispersants used in BP's draconian experiment contain solvents, such as petroleum distillates and 2-butoxyethanol. Solvents dissolve oil, grease, and rubber.
The BP (BP) oil spill may be over, but controversy over the company's use of toxic oil dispersants in the Gulf of Mexico is still going strong. Although BP allegedly stopped using the chemicals ...
Children under 6 are more likely to be exposed, but a new study finds that fatal poisonings from laundry detergent pods in a recent three-year period were all in adults.
Additional safety concerns were raised by the use of roughly nine million litres of oil dispersants, Corexit 9527 and 9500, during the clean-up operation. It was the largest known application of such dispersants to date, [ 9 ] and the first use of dispersants at that depth.
If the federal government shuts down this weekend, work at numerous publicly funded agencies would slow or stop altogether, while millions of government employees would stop receiving paychecks.
Twelve other products received better toxicity and effectiveness ratings, but BP says it chose to use Corexit because it was available the week of the rig explosion. [ 31 ] [ 32 ] Critics contend that the major oil companies stockpile Corexit because of their close business relationship with its manufacturer Nalco .