Posted by Greg1959 on March 22, 2019 at 13:06:22 from (174.254.131.152):
In Reply to: Re: Water storage posted by Traditional Farmer on March 22, 2019 at 12:57:35:
Copper sulfate is only moderately toxic upon acute oral exposure (17). There have been reports of human suicide resulting from the ingestion of gram quantities of this material (10). The lowest dose of copper sulfate that has been toxic when ingested by humans is 11 mg/kg (8). Ingestion of copper sulfate is often not toxic because vomiting is automatically triggered by its irritating effect on the gastrointestinal tract. Symptoms are severe, however, if copper sulfate is retained in the stomach, as in the unconscious victim. Some of the signs of poisoning which occurred after 1-12 grams of copper sulfate was swallowed include a metallic taste in the mouth, burning pain in the chest and abdomen, intense nausea, vomiting, diarrhea, headache, sweating, shock, discontinued urination leading to yellowing of the skin. Injury to the brain, liver, kidneys and stomach and intestinal linings may also occur in copper sulfate poisoning (2).
Copper sulfate can be corrosive to the skin and eyes. It is readily absorbed through the skin and can produce a burning pain, along with the same severe symptoms of poisoning from ingestion. Skin contact may result in itching or eczema (13). It is considered a skin sensitizer and can cause allergic reactions in some individuals (16). Eye contact with this material can cause: conjunctivitis, inflammation of the eyelid lining, excess fluid buildup in the eyelid; cornea tissue deterioration due to breaks, or ulceration, in the eye's mucous membrane; and clouding of the cornea (2).
The amount of copper sulfate that is lethal to one-half (50%) of experimental animals fed the material is referred to as its acute oral lethal dose fifty, or LD50. The LD50 for copper sulfate is 30 mg/kg in rats. Ingestion by animals of three ounces of a 1% solution of copper sulfate will produce extreme inflammation of the gastrointestinal tract, with symptoms of abdominal pain, vomiting, and diarrhea. When copper sulfate is given intravenously, or injected into the vein, as little as 2 mg/kg copper sulfate is lethal to guinea pigs; and 4 mg/kg is lethal to rabbits (13).
CHRONIC EFFECTS Vineyard sprayers experienced liver disease after 3 to 15 years of exposure to copper sulfate solution in Bordeaux mixture (13). Long-term effects are more likely in individuals with Wilson's disease, a condition which causes excessive absorption and storage of copper (11). Chronic exposure to low levels of copper can lead to anemia (13). The biological or chemical manner by which excessive doses of copper sulfate work is not well understood (6).
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