Tetraethyl pyrophosphate
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Tetraethyl pyrophosphate, abbreviated TEPP, is an organophosphate compound with the formula [(C2H5O)2P(O)]2O. It is the tetraethyl derivative of pyrophosphate (P2O74-). It is a colorless oil that solidifies near room temperature. It is used as an insecticide. The compound hydrolyzes rapidly.[3]
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
Tetraethyl diphosphate | |
Identifiers | |
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3D model (JSmol) |
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ChEBI | |
ChEMBL | |
ChemSpider |
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ECHA InfoCard | 100.003.179 |
EC Number |
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KEGG | |
PubChem CID |
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RTECS number |
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UNII | |
UN number | 3018 2783 |
CompTox Dashboard (EPA) |
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Properties | |
C8H20O7P2 | |
Molar mass | 290.189 g·mol−1 |
Appearance | colorless to amber liquid[1] |
Odor | faint, fruity[1] |
Density | 1.19 g/mL (20°C)[1] |
Melting point | 0 °C; 32 °F; 273 K[1] |
Boiling point | decomposes[1] |
miscible[1] | |
Vapor pressure | 0.0002 mmHg (20°C)[1] |
Hazards | |
GHS labelling: | |
Danger | |
H300, H310, H400 | |
P262, P264, P270, P273, P280, P301+P310, P302+P350, P310, P321, P322, P330, P361, P363, P391, P405, P501 | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LDLo (lowest published) |
0.5 mg/kg (rat, oral) 2.3 mg/kg (guinea pig, oral) 3 mg/kg (mouse, oral)[2] |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 0.05 mg/m3 [skin][1] |
REL (Recommended) |
TWA 0.05 mg/m3 [skin][1] |
IDLH (Immediate danger) |
5 mg/m3[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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