Precautions
Being a noble metal, pure rhodium is inert. However, chemical complexes of rhodium can be reactive. Median lethal dose (LD50) for rats is 198 mg of rhodium chloride (RhCl3) per kilogram of body weight. Rhodium compounds can strongly stain human skin. Like the other noble metals, all of which are too inert to occur as chemical compounds in nature, rhodium has not been found to play, or suspected to play, any biological role. If used in elemental form rather than as compounds, the metal is harmless.
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Famous quotes containing the word precautions:
“We must take precautions against being prematurely honed sharp—since at the same time we are being prematurely honed thin.”
—Friedrich Nietzsche (1844–1900)
“A multitude of little superfluous precautions engender here a population of deputies and sub-officials, each of whom acquits himself with an air of importance and a rigorous precision, which seemed to say, though everything is done with much silence, “Make way, I am one of the members of the grand machine of state.””
—Marquis De Custine (1790–1857)
“It is so manifestly incompatible with those precautions for our peace and safety, which all the great powers habitually observe and enforce in matters affecting them, that a shorter water way between our eastern and western seaboards should be dominated by any European government, that we may confidently expect that such a purpose will not be entertained by any friendly power.”
—Benjamin Harrison (1833–1901)