Sulfonate group radioactive

Muller and Payot (196S) established by the radioactive-isotope method that the methylthio group of bis(alkylamino)-2-methylthio-. -triazines is oxidised in plants first to the sulfoxy then to the sulfon group, which is then quickly hydrolysed to the inactive hydroxy derivative ... 

The tetraethyl ester of 1,1-vinylidenediphosphonic acid has been used to make cross-linked copolymers which are ion-exchange resins with selective chelation properties for toxic metal cations (78). An alternative method for introducing the diphosphonic acid structure is by reaction of a methylenediphosphonic ester with chloromethylated styrene copolymer beads (79). At least one such resin class, Diphonix, also containing sulfonic acid and other functional groups, has shown promise for treatment of radioactive waste and for iron control in copper electrowinning (80,81). 

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