It has been found that even though the reaction of isocyanates with oxyalkylenated aminophenol compounds results in the formation of oxyalkylene groups on the phenolic hydroxyl group, the subsequent reaction of {HEAD ~ the urethane substituted aminophenol} with {TAIL ~ phthalic anhydride proceeds} very well producing a xanthene colorant free of phthalates, pure and completely compatible in wax and oil systems conforming with the Formula 
with
It has been found that even though the reaction of isocyanates with oxyalkylenated aminophenol compounds results in the formation of oxyalkylene groups on the phenolic hydroxyl group , the subsequent reaction of { HEAD ~ the urethane substituted aminophenol } with { TAIL ~ phthalic anhydride proceeds } very well producing a xanthene colorant free of phthalates , pure and completely compatible in wax and oil systems conforming with the Formula
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH