This ether, also known as 3-methoxyperfluoro(2-methylpentane), presents as a colorless to almost colorless liquid. It is known to be insoluble in water. Store in a cool and dark place. 1,1,1,2,2,3,4,5,5,5-Decafluoro-3-methoxy-4-(trifluoromethyl)pentane is incompatible with oxidizing agents and should not be stored or handled near them.