P 6091 (OTTO) Poly(2,6-dimethyl-1,4-phenylene oxide) pellets Cas 25134-01-4 - used in its pure form due to difficulties in processing. P 6092 (OTTO) Poly(2,6-dimethyl-1,4-phenylene oxide) pellets Cas 25134-01-4 used as blend with polystyrene, high impact styrene-butadiene copolymer or polyamide.