Tris(trimethylsilyl)phosphate Chemical Properties

Melting point:

3-4 °C (lit.)

Boiling point:

228-229 °C/720 mmHg (lit.)

Density 

0.945 g/mL at 25 °C (lit.)

vapor pressure 

23.3hPa at 20℃

refractive index 

n20/D 1.409(lit.)

Flash point:

76 °F

storage temp. 

under inert gas (nitrogen or Argon) at 2-8°C

pka

23-25(at 25℃)

form 

liquid

Specific Gravity

0.959

color 

Colorless to Light yellow to Light orange

Water Solubility 

935.5μg/L at 20℃

Hydrolytic Sensitivity

8: reacts rapidly with moisture, water, protic solvents

BRN 

1794624

LogP

4.72 at 20℃

CAS DataBase Reference

10497-05-9(CAS DataBase Reference)

EPA Substance Registry System

Silanol, trimethyl-, phosphate (3:1) (10497-05-9)

Safety Information

Hazard Codes 

F,Xi

Risk Statements 

11-36/37/38

Safety Statements 

16-26-36

RIDADR 

UN 1993 3/PG 2

WGK Germany 

2

RTECS 

TC9700000

F 

10-21

TSCA 

Yes

HS Code 

2931.90.9010

HazardClass 

3.2

PackingGroup 

III

MSDS

• Language:English Provider:SigmaAldrich

Tris(trimethylsilyl)phosphate Usage And Synthesis

Chemical Properties

Colorless liquid

Uses

Tris(trimethylsilyl) phosphite (TMSPi) is a film-forming additive for high voltage cathode material in lithium-ion batteries. Tris (trimethylsilyl) phosphate is cleaved by alkali-metal fluorides, nitrates, and acetates at give the trimethylsilyl esters of the corresponding acids.

Definition

ChEBI: Tris(trimethylsilyl) phosphate is an organosilicon compound that is phosphoric acid in which the three hydroxy groups are substituted by (trimethylsilyl)oxy groups. It is a phosphoric acid derivative and an organosilicon compound.

Preparation

Tris(trimethylsilyl)phosphine is prepared by treating trimethylsilyl chloride, white phosphorus, and sodium-potassium alloy:
1/4 P4 + 3 Me3SiCl + 3 K → P(SiMe3)3 + 3 KCl

General Description

Tris(trimethylsilyl) phosphate has been investigated as a novel film-forming additive for LiNi_0.5Co_0.2Mn_0.3O₂ cycling at high cut-off potential in LiPF₆-based electrolyte. Tris(trimethylsilyl) phosphate [Tris(trimethylsilyl) ester of phosphoric acid] undergoes dealkylsilylation reaction with alumazene to yield heteroadamantane molecule.

Reactivity Profile

Tris(trimethylsilyl)phosphine and its more reactive derivative lithium bis-(trimethylsilyl)phosphide·2tetrahydrofuran are very useful reagents for the preparation of compounds with a single or a multiple element phosphorus bond. They react readily with various element halides, with carboxylic acid chlorides, and with carboxylic esters, as well as with other organic electrophiles via a substitution of lithium and/or a cleavage of the weak polar Si-P bonds.

Flammability and Explosibility

Not classified

Tris(trimethylsilyl)phosphate(10497-05-9)Related Product Information

• TRIS(TRIMETHYLSILYL)PHOSPHITE
• Lithium bis(trimethylsilyl)amide
• Trimethyl phosphate
• Tris(trimethylsilyl) borate
• TRIS(2,2,2-TRIFLUOROETHYL)PHOSPHATE
• Tri-o-cresyl Phosphate
• TRI-M-TOLYL PHOSPHATE
• Tris(2-butoxyethyl) phosphate
• Sodium Phosphate, Dibasic
• Calcium phosphate monobasic
• Potassium di-tert-butyl phosphate
• Tris(1-Chloro-2-Propyl) Phosphate
• Triisobutyl phosphate
• Tris(2-chloropropyl) phosphate
• Ammonium phosphate dibasic
• Tris(1,1,1,3,3,3-hexafluoroisopropyl) phosphate
• Calcium phosphate
• Bis(2-ethylhexyl) phosphate