Global InformationDiethyl dithiophosphoric acid information
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| Names | |
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| Preferred IUPAC name
O,O-Diethyl hydrogen phosphorodithioate | |
| Other names
O,O-Diethyl dithiophosphoric acid; Diethyl dithiophosphate; Diethyl phosphorodithioate; Diethyl ester of phosphorodithioic acid
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| Identifiers | |
CAS Number
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3D model (JSmol)
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| ECHA InfoCard | 100.005.506 |
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PubChem CID
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CompTox Dashboard (EPA)
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InChI
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SMILES
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| Properties | |
Chemical formula
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C4H11O2PS2 |
| Molar mass | 186.22 g·mol−1 |
| Appearance | colorless liquid |
| Melting point | < 0 °C (32 °F; 273 K) |
| Boiling point | 66 °C (151 °F; 339 K) at 1 mmHg |
| Hazards | |
| GHS labelling: | |
Pictograms
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Signal word
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Danger |
Hazard statements
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H301, H311, H314, H330 |
Precautionary statements
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P260, P264, P270, P271, P280, P284, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 |
| NFPA 704 (fire diamond) | 
3
2
1 |
| Flash point | 82 °C (180 °F; 355 K) |
Autoignition
temperature |
538 °C (1,000 °F; 811 K) |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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500 mg/kg (rabbit, dermal) 4510 mg/kg (rat, oral) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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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. Although samples can appear dark, it is a colorless liquid.[1]
It is prepared by treating phosphorus pentasulfide with ethanol:[2]
- P2S5 + 4 C2H5OH → 2 (C2H5O)2PS2H + H2S
- ^ J. Svara, N. Weferling, T. Hofmann "Phosphorus Compounds, Organic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2006. doi:10.1002/14356007.a19_545.pub2
- ^ Lefferts, J. L.; Molloy, K. C.; Zuckerman, J. J.; Haiduc, I.; Guta, C.; Ruse, D. (1980). "Oxy and thio phosphorus acid derivatives of tin. 1. Triorganotin(IV) dithiophosphate esters". Inorganic Chemistry. 19 (6): 1662–1670. doi:10.1021/ic50208a046.