1,1,2,2,3,3,4,4,4-Nonafluoro-N-(2-methoxyethyl)-1-butanesulfonamide is an intermediate used in the synthesis of 1,1,2,2,3,3,4,4,4-Nonafluoro-N-(2-hydroxyethyl)-1-butanesulfonamide (N649505), which is derived from Nonafluoro-1-butanesulfonyl Fluoride (N649320), which is a useful perfluorinated compound (PFC) used in organic synthesis.