The title compound, C 6H 11N 2O 4PS 3, crystallizes with two independent molecules in the asymmetric unit. The dihedral angles between the thiadiazole ring planes and the PS 2 planes of the phosphorodithioate group are 86.51 (5) and 56.33 (5)° in the two molecules. In the crystal, weak intermolecular S⋯S [3.570 (8) Å] interactions and C—H⋯O and C—H⋯N hydrogen bonds contribute to the stabilization of the packing.