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1,3 Di-n-octyloxy Calix[4] arene crown 6 is a calixarene with aliphatic ether alcohol function group appended to the lower rim and a crown cap forming a crown ether.
D 9021 (OTTO) 1,3 Di-n-octyloxy Calix[4] arene crown 6, 98% Cas 161282-97-9 - used for cesium extraction from acidic high activity nuclear waste.