4-Morpholinecarbonyl chloride is a photographic intermediate. Rates of solvolysis of 4-morpholinecarbonyl chloride with N-alkyl group in aqueous binary solvents of acetone, ethanol, methanol, methanol-d, 2,2,2-trifluoroethanol, pure water and D2O has been determined. Preparation of 4-morpholinecarbonyl chloride has been reported.