Hexaethyl tetraphosphate
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Hexaethyl tetraphosphate (also known as HETP) is the organophosphorus compound with the chemical formula [(C2H5O)3P2O3]2O. The compound has not been isolated in pure form but appears to be a colorless liquid at room temperature. Commercial samples appear brown due to impurities.[1][2] It is a constituent of the insecticide Bladan.[3] In the 1940s, it was about as significant an insecticide as DDT and was referred to as "another of DDT's rivals for fame" in a 1948 book.[4]
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
Hexaethyl tetraphosphate | |
Other names
HETP; ethyl tetraphosphate, hexa-; Bladan Base | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.010.961 |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C12H30P4O13 | |
Molar mass | 506.25 g/mol |
Appearance | yellow to brown liquid |
Density | 1.331 g/cm3 |
Melting point | −40 °C (−40 °F; 233 K) |
Boiling point | 467.01 °C (872.62 °F; 740.16 K) |
moderate | |
Solubility | most organic solvents |
Refractive index (nD) |
1.443 |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
skin absorption; inhalation |
Flash point | 120.82 °C (249.48 °F; 393.97 K) |
Related compounds | |
Related compounds |
tetraethyl pyrophosphate pentaethyl triphosphate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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