I don't think I'll be eating any fish that comes from the Gulf of Mexico (or Atlantic Ocean) for a while ….. Today they are saying the oil and dispersants may also enter the loop current that will take the toxic waste into the Florida keys and the Atlantic Ocean.
"Dispersants being dumped in large quantities into the Gulf of Mexico may cause central nervous system effects, nausea, vomiting, anesthetic or narcotic effects," and "repeated or excessive exposure to butoxyethanol [an active ingredient] may cause injury to red blood cells (hemolysis), kidney or the liver." - Countercurrents.org (see link below)
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Here is a link to the MSDS on 2-butoxyethanol
http://www.sciencelab.com/xMSDS-2_Butoxyethanol-9923187
Section 3: Hazards Identification
Potential Acute Health Effects:
Hazardous in case of skin contact (permeator), of eye contact (irritant), of ingestion, of inhalation. Slightly
hazardous in case of skin contact (irritant). Severe over-exposure can result in death.
Potential Chronic Health Effects:
CARCINOGENIC EFFECTS: Not available.
MUTAGENIC EFFECTS: Mutagenic for bacteria and/or yeast.
TERATOGENIC EFFECTS: Not available.
DEVELOPMENTAL TOXICITY: Not available.
The substance may be toxic to blood, kidneys, liver, central nervous system (CNS).
Repeated or prolonged exposure to the substance can produce target organs damage. Repeated exposure to a
highly toxic material may produce general deterioration of health by an accumulation in one or many human
organs.
OSHA requires companies to make Material Safety Data Sheets, or MSDSs, available for any hazardous substances used in a workplace, and the ones for these dispersants both contain versions of a disturbing statement. 9500's states that "Component substances have a potential to bioconcentrate,"
This is not what you want to hear about toxins being dumped in the sea by the hundreds of thousands of gallons. The EPA defines bioconcentration as the "accumulation of a chemical in tissues of a fish or other organism to levels greater than in the surrounding medium." In other words, substances that bioconcentrate tend to move from water into fish, where they can do damage to the fish itself, as well as be passed on to predator fish -- and on up the food chain, to human eaters.
And just how toxic is this stuff? The data sheets for both products contain this shocker: "No toxicity studies have been conducted on this product" -- meaning testing their safety for humans.
This is jaw-dropping. According to Ronald Tjeerdema, chair of the Department of Environmental Toxicology at UC Davis' College of Agricultural & Environmental Sciences, who has been studying dispersants since the '90s, "The industry typically only stockpiles one or two of these things," and while Corexit 9527 has been the dispersant of choice for a long time, in recent years, Corexit 9500 has gained prominence. Yet Nalco has done no toxicity studies on these industry-dominating products now in heavy use in the Gulf?
They do appear to have toxic properties. Both data sheets include the warning "human health hazards: acute." The MSDS for Corexit 9527A states that "excessive exposure may cause central nervous system effects, nausea, vomiting, anesthetic or narcotic effects," and "repeated or excessive exposure to butoxyethanol [an active ingredient] may cause injury to red blood cells (hemolysis), kidney or the liver."
It adds: "Prolonged and/or repeated exposure through inhalation or extensive skin contact with EGBE [butoxyethanol] may result in damage to the blood and kidneys."
http://www.countercurrents.org/philpott070510.htm
So, what's in the stuff? According to their data sheets, both 9500 and 9527 are composed of three potentially hazardous substances. They share two in common, organic sulfonic acid salt and propylene glycol. In addition to those two, Corexit 9500 contains something called "Distillates, petroleum, hydrotreated light," while Corexit 9527 contains 2-Butoxyethanol. Frustratingly, the sheets don't give exact information about how much of the substances are in the dispersants; instead they give ranges as a percentage of weight. For example, Corexit 9500 can be composed of anywhere from 10 to 30 percent petroleum distillates, while 2-Butoxyethanol makes up anywhere from 30 to 60 percent of 9527. (Countercurrent.org)
According to Wikipedia:
http://en.wikipedia.org/wiki/2-Butoxyethanol#Safety Safety
It is recommended that one use precautions when working with glycol ethers such as 2-butoxyethanol, as it is toxic. Employers are required by United States federal law to inform employees when they are working with these substances
Some animal studies indicate that it produces reproductive problems, such as reduced fertility, death of embryos and birth defects.People exposed to high levels of 2-butoxyethanol for several hours have reported nose and eye irritation, headaches, vomiting and a metallic taste in their mouths. In addition to inhaling 2-butoxyethanol vapor, research has shown that skin can also absorb 2-butoxyethanol vapor from the air, making skin a major pathway of exposure to this chemical. It has been linked to some autoimmune diseases such as chronic fatigue syndrome and autism and some forms of anemia.
2-Butoxyethanol is frequently found in popular cleaning products. It is difficult for consumers to know whether their favorite cleaner contains the chemical because manufacturers are not required to list it on the label.
This compound is on California's list of hazardous substances,though it was removed from the U.S. Environmental Protection Agency's list of hazardous air pollutants in 1994.
In recent years 2-butoxyethanol has come under increased scrutiny in Canada, and Environment and Health Canada has recommended that it be added to Schedule 1 of the Canadian Environmental Protection Act (CEPA).
William Nazaroff, a professor of environmental engineering and chairman of the Energy and Resources Group at UC Berkeley, has argued that EGBE should have remained on the federal contaminants list, and concluded in a study that the use of some common household cleaning products containing EGBE could expose people to levels 12 times greater than California's one-hour guideline, especially when indoor use is considered.These products are not required to list it on the label when diluted to a certain point. The safety of the products is defended by the American Chemistry Council and the Soap and Detergent Association, industry trade groups.
Excessive human exposure:
Moderate respiratory exposure to 2-butoxyethanol often results in irritation of mucous membranes of the eyes, nose and throat. Heavy exposure via respiratory, dermal or oral routes can lead to hypotension, metabolic acidosis, hemolysis, pulmonary edema and coma. Blood or urine concentrations of 2-butoxyethanol or its major toxic metabolite, 2-butoxyacetic acid, may be measured using chromatographic techniques to monitor worker exposure or to confirm a diagnosis of poisoning in hospitalized patients. A biological exposure index of 200 mg 2-butoxyacetic acid per g creatinine has been established in an end-of-shift urine specimen for exposed U.S. employees. (Wikipedia)
Yikes !