prov:value
| - 3 and R, being independently selected from C, - C^ linear or branched, substituted or unsubstituted alkyl, cycloalkyl, alkylene, alkaryl, and aryl groups and M is a cation selected from Na, K, NH, [including (CH 3 CH 2 ) 3 NH, (CH 3 CH 2 ) 2 NH 2 , (HOCH 2 CH 2 ) 3 NH, (HOCH 2 CH 2 ) 2 NH 2 and similar ammonium derivatives], Ba, Ca, Mg, Al, Ti, Zr, and mixtures thereof.
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