Corexit: Dr. Susan Shaw warns people of the serious effects of Corexit saying it, “Ruptures red blood cells, causes internal bleeding, liver and kidney damage and allows crude oil to penetrate into cells and all organ systems.” The combination of oil and Corexit is extremely toxic and absorbs through skin. Solvents in the dispersants penetrate the skin carrying the oil into the cells, and then circulates into the organs creating extreme toxicity.
EPA testing for mortality is inadequate states marine biologist and toxicologist Dr. Chris Pincetich. His background is in testing the impact of chemicals on marine life. He further states that Corexit disrupts the cell wall membrane. EPA mortality uses a 96-hour time frame: Pincetich found that fish exposed to pesticides remained alive at 96 hours, but were dead at two weeks. In this way EPA claims that the chemicals are non-lethal for the purposes of their testing.
EPA has problems too at the BP of the Northwest (www.silvervalleyaction.com).
Some information about Corexit, the dispersant used in the Exxon Valdez catastrophe and what seems to be making people sick in the Gulf as a result of it being used in the BP explosion.
'Corexit is lethal in as little as 2.6 parts per million where oil is lethal in 11 parts per million meaning that Corexit is over 4 times more toxic than oil. Furthermore scientific studies show that oil dispersed with Corexit is 11 times more lethal than oil alone. In fact the study referenced showed that crude oil was lethal at 4250 parts per million to kill fish but combination of oil mixed with Corexit was lethal in as little as 317.7 ppm.' read more
NB: butylcellusolve is a very toxic substance and is often used in home cleaning products.
Also from CDC information: Type of Dispersants used on the Mississippi Canyon Oil Spill -Based on the information provided to NIOSH, two dispersants are currently being used for the Gulf of Mexico oil spill response. These dispersants are COREXIT® EC9527A and COREXIT 9500 made by the Nalco Company in Naperville, Illinois. Both products contain 10-30% sulfonic acid salt (detergent) and 1-5% propylene glycol, which are regarded as non-hazardous substances. In addition, COREXIT EC9527A contains between 30-60% of 2-butoxyethanol (solvent) and COREXIT 9500 contains between 10-30% of petroleum distillates (solvent).2-butoxyethanol, also called butyl cellusolve, is a widely used cleaning agent. The potential human health effects of 2-butoxyethanol have been studied. Dispersants containing 2-butoxyethanol may irritate the skin. 2-butoxyethanol vapors or mists can cause respiratory irritation such as coughing.
Several occupational exposure limits (OELs) have been established for 2-butoxyethanol. The legally enforceable OEL in the United States is the Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (PEL). For airborne 2-butoxyethanol the OSHA PEL is 50 parts per million (ppm) for up to a full work shift.
The NIOSH Recommended Exposure Limit (REL) for 2-butoxyethanol is 5 ppm, also for up to a full work shift. The NIOSH REL is intended to minimize potential long-term health effects to workers, primarily hemolysis of red blood cells (RBCs). Hemolysis of RBCs has been found in animals exposed to 2-butoxyethanol, but recent data suggests that human RBCs are less susceptible to these effects. Both the OSHA PEL and NIOSH REL contain guidance to minimize skin contact with 2-butoxyethanol.
Other articles regarding the oil spill can be found here, including photos of the Santa Barbara oil clean up utilizing straw (1969) and other options that seem to be desperately needed. As noted on 27 May, during a radio interview, it was noted that at Santa Barbara CA, oil still remains after 40+ years.
Oil dispersant qualities are found in colloidal solutions made from seed-bearing plant materials; similar products have been used in the Exxon Valdez oil spill. You can purchase a Made-in-the-USA colloidal product here.
See Also OilGator
Gulf of Mexico oil spill: clean-up boats recalled after crews suffer health problems (Courtesy: Rense.com)
Also refer to this post
LOOKUP MSDS SHEETS
This article is ranked 1 of 2,270,000, 27 May.
Posted 6/9/10: http://motherjones.com/mojo/2010/06/bp-oil-spill-dispersants-ingredients