Plomb
Lo plomb es un element quimic de simbòl Pb e de numèro atomic 82. Es un metal malleable gris blavenc, que ven blanc lentament en s'oxidar. Se considera actualament qu'es un element toxic, mutagèn e reprotoxic, sens cap de valor coneguda d'oligoelement. Lo plomb foguèt classificat coma potencialament cancerigèn tre 1980, dins lo grop 2B pel CIRC10 e puèi coma probablament cancerigèn per l'òme e l'animal en 2004. Dos de las sals de plomb, lo cromat de plomb e l'arseniat de plomb, son considerats coma carcinogènas pel CIRC.
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