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Thallium was an effective murder weapon before its effects became understood and an antidote (Prussian blue) was discovered. [7] Thallium is often imported for products like optical lenses and electronics. The US has not manufactured thallium since 1984.
The suggested safe level of copper in drinking water for humans varies depending on the source, but tends to be pegged at 1.3 mg/L. [2] So low is the toxicity of copper that copper(II) sulfate is a routine reagent in undergraduate chemistry laboratories.
While humans have been able to adapt to higher levels of concentrations with time, some effects of ingestion of sulfur water has found to have cathartic effects on people consuming water with sulfate concentrations of 600 mg/litre according to a study from the US Department of health in 1962.
The sulfate or sulphate ion is a polyatomic anion with the empirical formula SO 2− 4. Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life. Sulfates are salts of sulfuric acid and many are prepared from that acid.
Magnesium sulfate is effective in decreasing the risk that pre-eclampsia progresses to eclampsia. [24] Intravenous magnesium sulfate is used to prevent and treat seizures of eclampsia. It reduces the systolic blood pressure but does not alter the diastolic blood pressure, so the blood perfusion to the fetus is not compromised.
Diethyl sulfate (DES) is an organosulfur compound with the formula (C 2 H 5) 2 SO 4. [ 1 ] [ 2 ] It occurs as a colorless, oily liquid with a faint peppermint odor. It is toxic , combustible , and likely carcinogenic chemical compound .
The effect of seawater intake on rats confirmed the negative effects of drinking seawater when dehydrated. [10] In contrast to humans, pelagic birds and other sea animals can – and must – drink sea water without ill effects, having evolved for life at sea over the course of aeons.) [ citation needed ]
Animals and humans naturally produce some hydrogen sulfide in their body; researchers have proposed that the gas is used to regulate metabolic activity and body temperature, which would explain the above findings. [18] Two recent studies cast doubt that the effect can be achieved in larger mammals.