Tributyl Phosphate
Title: Tributyl Phosphate
CAS Registry Number: 126-73-8
CAS Name: Phosphoric acid tributyl ester
Molecular Formula: C12H27O4P
Molecular Weight: 266.31
Percent Composition: C 54.12%, H 10.22%, O 24.03%, P 11.63%
Line Formula: (C4H9)3PO4
Literature References: Prepd by reaction of POCl3 with butyl alcohol: Pianfetti, Janey, US 3020303 (1962 to FMC). Toxicity study: Smyth, Carpenter, J. Ind. Hyg. Toxicol. 26, 269 (1944).
Properties: Colorless, odorless liq; d2525 0.976; bp 289° with decompn; bp27 177-178°; mp below -80°. Flash pt 146°C. nD25 1.4215. One ml dissolves in about 165 ml water; miscible with usual organic solvents. LD50 orally in rats: 3.0 g/kg (Smyth, Carpenter).
Melting point: mp below -80°
Boiling point: bp 289° with decompn; bp27 177-178°
Flash point: Flash pt 146°C
Index of refraction: nD25 1.4215
Density: d2525 0.976
Toxicity data: LD50 orally in rats: 3.0 g/kg (Smyth, Carpenter)
CAUTION: Potential symptoms of overexposure are irritation of eyes, respiratory system and skin; headache; nausea. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 314.
Use: Plasticizer for cellulose esters, lacquers, plastics, and vinyl resins.

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