Tributyl phosphate

Tributyl phosphate
Names
	Preferred IUPAC name Tributyl phosphate
Identifiers
CAS Number	126-73-8 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:35019 ;
ChemSpider	29090 ;
ECHA InfoCard	100.004.365
KEGG	C14439 ;
PubChem CID	31357;
UNII	95UAS8YAF5;
CompTox Dashboard (EPA)	DTXSID3021986 ;
	InChI InChI=1S/C12H27O4P/c1-4-7-10-14-17(13,15-11-8-5-2)16-12-9-6-3/h4-12H2,1-3H3 Key: STCOOQWBFONSKY-UHFFFAOYSA-N ; InChI=1/C12H27O4P/c1-4-7-10-14-17(13,15-11-8-5-2)16-12-9-6-3/h4-12H2,1-3H3 Key: STCOOQWBFONSKY-UHFFFAOYAN;
	SMILES O=P(OCCCC)(OCCCC)OCCCC;
Properties
Chemical formula	C12H27O4P
Molar mass	266.318 g·mol−1
Appearance	Colorless to pale-yellow liquid
Density	0.9727 g/mL
Melting point	−80 °C (−112 °F; 193 K)
Boiling point	289 °C (552 °F; 562 K)
Solubility in water	0.4 g/L
Vapor pressure	0.004 mmHg (25°C)
Refractive index (nD)	1.4231 (at 20 °C)
Hazards
NFPA 704 (fire diamond)	2 1 1
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)
LC50 (median concentration)	227 ppm (cat, 4–5 h); 123 ppm (rat, 6 h); 117 ppm (rat); 2529 ppm (rat, 1 h)
LCLo (lowest published)	2214 ppm (cat, 5 h)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 5 mg/m3
REL (Recommended)	TWA 0.2 ppm (2.5 mg/m3)
IDLH (Immediate danger)	30 ppm
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). verify (what is ?) Infobox references

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.