Fluoruro

Lo ione fluoruro (formula chimica F−) è l'anione del fluoro con numero di ossidazione -1.

I sali che contengono uno ione di questo tipo vengono detti fluoruri.

I fluoruri si trovano in natura, in genere in minerali come la fluorite oppure disciolti in basse concentrazioni nelle acque e in alcuni cibi quali tè e alghe.

Le acque di sorgente in genere hanno concentrazioni più alte di fluoruri mentre l'acqua marina ha una concentrazione media intorno 1,3 ppm[senza fonte]. Le acque potabili in genere contengono concentrazioni di fluoruri tra 0,01 e 0,3 ppm.

Proprietà

I fluoruri sono normalmente incolori e poco solubili in acqua.

Impieghi

Composti

Esempi di composti di fluoruri includono:

Fluoruro di solforile

Il fluoruro di solforile, SO2F2, viene spesso utilizzato come antiparassitario, per disinfestare gli edifici dagli insetti.

In merito a questo composto alcuni ricercatori della Scripps Institution of Oceanography di San Diego, in California, hanno scoperto che il suo impatto sul clima è 4.800 volte più dannoso dell'anidride carbonica.[senza fonte]

Le circa 2.000 t liberate ogni anno corrisponderebbero a quasi 10 milioni di t di CO2.

Inoltre hanno verificato che rimane attivo nell'ambiente per 36 anni.

Bibliografia

Altri progetti

Collegamenti esterni

Controllo di autoritàNDL (EN, JA) 00563615
  Portale Chimica: il portale della scienza della composizione, delle proprietà e delle trasformazioni della materia

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