Diethyl dithiophosphoric acid

Diethyl dithiophosphoric acid, sometimes mistakenly called diethyl dithiophosphate, is the organophosphorus compound with the formula (C2H5O)2PS2H.

It is the processor for production of the organophosphate insecticide Terbufos.

[1] It is prepared by treating phosphorus pentasulfide with ethanol:[2] Diethyl- and dimethyl dithiophosphoric acids react with bases.

The results of this neutralization reaction are salts, e.g., ammonium diethyl dithiophosphate.

[3] Diethyl dithiophosphoric acid reacts with zinc oxide to give zinc dithiophosphate, which is used as an oil additive:[4]

NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuel Instability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calcium Special hazards (white): no code
Zinc dithiophosphate .