4-Amino-2,6-dimethoxypyrimidine is methoxy substituted 4-aminopyrimidine. Molecules of 4-amino-2,6-dimethoxypyrimidine are linked by an N-H. O hydrogen bond and an N-H. N hydrogen bond, forming sheets containing centrosymmetric rings. Photocatalytic degradation of 4-amino-2,6-dimethoxypyrimidine on TiO2 has been reported. Mass spectra of 4-amino-2,6-dimethoxypyrimidine has been studied.