Empirical Formula of Isoxathion (CAS NO.18854-01-8): C₁₃H₁₆NO₄PS
Molecular Weight: 313.3092 g/mol
EINECS: 242-624-8 
Storage tempreture: 0-6 °C
Index of Refraction: 1.55
Density: 1.258 g/cm³
Flash Point: 207.6 °C
Enthalpy of Vaporization: 64.73 kJ/mol
Boiling Point: 419.6 °C at 760 mmHg
Vapour Pressure: 7.3E-07 mmHg at 25 °C
Structure of Isoxathion (CAS NO.18854-01-8):
              
IUPAC Name of Isoxathion (CAS NO.18854-01-8): Diethoxy-[(5-phenyl-1,2-oxazol-3-yl)oxy]-sulfanylidene-λ5-phosphane

Poison by ingestion, skin contact, and intraperitoneal routes. Moderately toxic by subcutaneous route. When heated to decomposition it emits very toxic fumes of NO_x, PO_x and SO_x.
Hazard Codes: T,N
Risk Statements: 24/25-50/53 
R24:Toxic in contact with skin. 
R25 :Toxic if swallowed. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 28-36/37-45-60-61 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S36/37:Wear suitable protective clothing and gloves. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.

 Isoxathion ,its cas register number is 18854-01-8. It also can be called Phosphorothioic acid, O,O-diethyl O-(5-phenyl-3-isoxazolyl) ester ; Karphos ;and O,O-Diethyl O-5-phenylisoxazol-3-ylphosphorothioate .