Tributyl phosphate
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Tributyl phosphate, known commonly as TBP, is an organophosphorus compound with the chemical formula (CH3CH2CH2CH2O)3PO. This colourless, odorless liquid finds some applications as an extractant and a plasticizer. It is an ester of phosphoric acid with n-butanol.
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Tributyl phosphate | |||
Identifiers | |||
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3D model (JSmol) |
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ChEBI | |||
ChemSpider |
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ECHA InfoCard | 100.004.365 | ||
KEGG |
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PubChem CID |
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UNII | |||
CompTox Dashboard (EPA) |
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Properties | |||
C12H27O4P | |||
Molar mass | 266.318 g·mol−1 | ||
Appearance | Colorless to pale-yellow liquid[1] | ||
Density | 0.9727 g/mL | ||
Melting point | −80 °C (−112 °F; 193 K) | ||
Boiling point | 289 °C (552 °F; 562 K) | ||
0.4 g/L[2] | |||
Vapor pressure | 0.004 mmHg (25°C)[1] | ||
Refractive index (nD) |
1.4231 (at 20 °C) [3] | ||
Hazards | |||
NFPA 704 (fire diamond) | |||
Flash point | 146.1 °C (295.0 °F; 419.2 K) | ||
Lethal dose or concentration (LD, LC): | |||
LD50 (median dose) |
1189 mg/kg (mouse, oral) 3000 mg/kg (rat, oral)[4] | ||
LC50 (median concentration) |
227 ppm (cat, 4–5 h) 123 ppm (rat, 6 h) 117 ppm (rat) 2529 ppm (rat, 1 h)[4] | ||
LCLo (lowest published) |
2214 ppm (cat, 5 h)[4] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible) |
TWA 5 mg/m3[1] | ||
REL (Recommended) |
TWA 0.2 ppm (2.5 mg/m3)[1] | ||
IDLH (Immediate danger) |
30 ppm[1] | ||
Safety data sheet (SDS) | External MSDS | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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