... symmetric Dimethylurea, N,N'-Dimethylharnstoff (German); Urea, 1,3-dimethyl-; DMU; 1,3-Dimetilurea (Spanish); 1,3-Diméthylurée (French);Molecular Formula: ... alloxan and dihydroxyfumarate exposure. Methyl amine and 1,3-dimethylurea are hydrolysis products of methyl isocyanate. ... drugs. 1,3-Dimethylurea is used as a catalyst for condensation of methylamine with urea. 1,3-Dimethyl urea; N,N-Dimethyl urea