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Name Tributyl phosphate
CAS 126-73-8
EINECS(EC#) 204-800-2
Molecular Formula C12H27O4P
MDL Number MFCD00009436
Molecular Weight 266.31
MOL File 126-73-8.mol

Chemical Properties


On decomposition, TBP releases COx, toxic fumes of phosphoric acid, phosphorus oxides, and/or phosphine. TBP is incompatible with strong oxidising agents and alkalis. The major uses of TBP in industry are as a component of aircraft hydraulic fluid and as a solvent for rare earth extraction and purification. Minor uses of TBP include use as a defoamer additive in cement casings for oil wells, an anti-air entrainment additive for coatings and floor finishes, as well as a carrier for fluorescent dyes. The major uses of TBP comprise over 80% of the volume produced.

Appearance Stable, colorless liquid; odorless. Miscible with most solvents and diluents; soluble in water. Combustible.
Melting point  -79 °C (lit.)
Boiling point  180-183 °C/22 mmHg (lit.)
density  0.979 g/mL at 25 °C(lit.)
vapor density  9.2 (vs air)
vapor pressure  27 mm Hg ( 178 °C)
refractive index  n20/D 1.424(lit.)
Fp  380 °F
storage temp.  Store below +30°C.
solubility  water: soluble1ml in 165ml water
form  Liquid
color  Clear
Odor Odorless
Stability: Stable. Combustible. Incompatible with strong oxidizing agents. May be water sensitive.
Water Solubility  0.6 g/100 mL
Merck  14,9618
BRN  1710584
Exposure limits TLV-TWA 2.18 mg/m3 (0.2 ppm) (ACGIH), 5 mg/m3 (OSHA and NIOSH); IDLH 1300 mg/m3 (120 ppm) (NIOSH).
CAS DataBase Reference 126-73-8(CAS DataBase Reference)
NIST Chemistry Reference Tri-n-butylphosphate(126-73-8)
EPA Substance Registry System 126-73-8(EPA Substance)

Safety Data

Hazard Codes  Xn,F
Risk Statements 

R22:Harmful if swallowed.
R38:Irritating to the skin.
R40:Limited evidence of a carcinogenic effect.
R62:Possible risk of impaired fertility.
R48/20:Harmful: danger of serious damage to health by prolonged exposure through inhalation .
R36/37/38:Irritating to eyes, respiratory system and skin .
R11:Highly Flammable.

Safety Statements 

S36/37:Wear suitable protective clothing and gloves .
S46:If swallowed, seek medical advice immediately and show this container or label .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S16:Keep away from sources of ignition-No smoking .
S53:Avoid exposure-obtain special instruction before use .

RIDADR  UN 1208 3/PG 2
WGK Germany  2
RTECS  TC7700000
Autoignition Temperature 770 °F
HS Code  29190010
Safety Profile

Poison by intraperitoneal and intravenous routes. Moderately toxic by ingestion, inhalation, and subcutaneous routes. Experimental reproductive effects. A skin, eye, and mucous membrane irritant. Combustible when exposed to heat or flame. To fight fire, use CO2, dry chemical, fog, mist. When heated to decomposition it emits toxic fumes of POx.

Hazardous Substances Data 126-73-8(Hazardous Substances Data)

LD50 orally in rats: 3.0 g/kg (Smyth, Carpenter)

IDLA 30 ppm

Hazard Information

Material Safety Data Sheet(MSDS)

Questions And Answer

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