High Quality Content by WIKIPEDIA articles! Scheele's Green, also called Schloss Green, is chemically a cupric hydrogen arsenite (also called copper arsenite or acidic copper arsenite), CuHAsO3. It is a compound similar to Paris Green. It is a green pigment, of yellowish hue and was used in the past in some paints but has since fallen out of use due to its toxicity. Scheele's Green was invented in 1775 by Carl Wilhelm Scheele. By the end of the 19th century, it virtually replaced the older green pigments based on copper carbonate. During Napoleon's exile in St. Helena, he resided in a very luxurious bright green room. His cause of death is generally believed to be stomach cancer, however, analysis of his hair samples revealed significant amounts of arsenic. As St. Helena has a rather damp climate, it is more than possible that fungus grew on the wall. So as to remove the toxic arsenic, the fungus would release it in the form of arsine gas, which when inhaled causes arsenic poisoning. It has also been suggested that the presence of such abnormally high levels of arsenic might be due to attempts at preserving his body.

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