Phosphonic acid,P-[2-(triethoxysilyl)ethyl]-, diethyl ester cas no:757-44-8

NamePhosphonic acid,P-[2-(triethoxysilyl)ethyl]-, diethyl ester
CAS757-44-8
SynonymsPhosphonicacid, [2-(triethoxysilyl)ethyl]-, diethyl ester (6CI,7CI,8CI,9CI);Diethoxyphosphorylethyltriethoxysilane; Diethyl[2-(triethoxysilyl)ethane]phosphonate; Diethyl [b-(triethoxysilyl)ethyl]phosphonate
EINECS(EC#)212-056-5
Molecular FormulaC12H29 O6 P Si
Molecular Weight328.47

refractive index1.423-1.425

Hazard Xi
Risk R36/37/38
Safety

Mildly toxic by ingestion. When heated to decomposition it emits toxic vapors of PO_x.
 

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 37/39-26 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37/39:Wear suitable gloves and eye/face protection.

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rabbit	LD50	skin	> 16mL/kg (16mL/kg)		Toxicology and Applied Pharmacology. Vol. 28, Pg. 313, 1974.
rat	LD50	oral	17200uL/kg (17.2mL/kg)		Toxicology and Applied Pharmacology. Vol. 28, Pg. 313, 1974.

Carcinogenicity of Diethyl (2-(triethoxysilyl)ethyl)phosphonate (CAS NO.757-44-8) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65. And its toxicological properties have not been fully investigated.You can see actual entry in RTECS for complete information.