Molecular Structure of 2-(Diphenylphosphino)ethyltriethoxysilane (CAS NO.18586-39-5):

IUPAC Name: Diphenyl(2-triethoxysilylethyl)phosphane 
Molecular Formula: C₂₀H₂₉O₃PSi
Molecular Weight: 376.50
EINECS: 242-427-7 
Density: 1.05
Melting Point: <0 °C
Flash Point: 202.3 °C
Enthalpy of Vaporization: 63.75 kJ/mol
Boiling Point: 410.9 °C at 760 mmHg
Vapour Pressure: 1.39E-06 mmHg at 25 °C
Appearance: Clear colorless liquid
Canonical SMILES: CCO[Si](CCP(C1=CC=CC=C1)C2=CC=CC=C2)(OCC)OCC
InChI: InChI=1S/C20H29O3PSi/c1-4-21-25(22-5-2,23-6-3)18-17-24(19-13-9-7-10-14-19)20-15-11-8-12-16-20/h7-16H,4-6,17-18H2,1-3H3
InChIKey: HLXCYTXLQJWQFG-UHFFFAOYSA-N

Safety Information of 2-(Diphenylphosphino)ethyltriethoxysilane (CAS NO.18586-39-5):
Risk Statements: 20/21/22-36/37/38 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 23-26-36/37/39 
S23:Do not breathe vapour. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
TSCA: Yes

 2-(Diphenylphosphino)ethyltriethoxysilane (CAS NO.18586-39-5), its Synonyms are (Triethoxysilyl)ethyl diphenylphosphine ; Diphenyl(2-(triethoxysilyl)ethyl)phosphine ; Phosphine, diphenyl(2-(triethoxysilyl)ethyl)- ; beta-Diphenylphosphinoethyltriethoxysilane .
 2-(Diphenylphosphino)ethyltriethoxysilane and Co-condensation of tetraethyl orthosilicate synthesize PPh(2)-functionalized SBA-15 through prehydrolysis.