3244-90-4 A 42 ASP 51 Aspon Bis[O,O-di(N-propyl)]phosphorothionic anhydride E 8573 ENT 16,894 NPD NSC2550 O,O,O,O-Tetrapropyl dithiopyrophosphate Propyl thiopyrophosphate Propyl thiopyrophosphate ([(PrO)2P(S)]2O) Stauffer asp-51 Tetra-n-propyl dithionopyrophosphate Tetra-n-propyl dithiopyrophosphate Thiodiphosphoric acid ([(HO)2P(S)]2O), tetrapropyl ester Thiopyrophosphoric acid ([(HO)2PS]2O), tetrapropyl ester Thiopyrophosphoric acid, tetrapropyl ester WLN: 3OPS&O3&OPS&O3&O3