Abstract: Novel phenyl hydantoin compounds are disclosed of the structure: ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, amino, nitro, halogen, hydroxy, substituted and unsubstituted lower alkyl, cycloalkyl, phenyl and lower alkenyl; and R.sub.3 is substituted and unsubstituted lower alkyl, lower alkenyl and cycloalkyl; as well as pesticidal methods employing said novel compounds; and pesticidal compositions containing said novel compounds.

Abstract: A method for removing residual cresidine from impure p-cresidine sulfonic acid which impure p-cresidine sulfonic acid contains from above about two parts per billion to about 1500 parts per million of cresidine. The method comprises contacting an aqueous solution of the impure p-cresidine sulfonic acid with sufficient liquid hydrocarbon of from five to eighteen carbon atoms for a sufficient time to extract the cresidine from the p-cresidine sulfonic acid to a concentration of less than two parts per billion of cresidine in the p-cresidine sulfonic acid.