The Tetrachlorvinphos, with the CAS registry number 961-11-5 and EINECS registry number 213-506-3, has the systematic name of Phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl)ethenyl dimethyl ester. And the molecular formula of this chemical is C₁₀H₉Cl₄O₄P. It is a kind of colorless crystals or white powder, and it is slowly hydrolyzed in neutral and aqueous acidic media while rapidly hydrolyzed in alkaline media.

The physical properties of Tetrachlorvinphos are as following: (1)ACD/LogP: 3.86; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.86; (4)ACD/LogD (pH 7.4): 3.86; (5)ACD/BCF (pH 5.5): 503.66; (6)ACD/BCF (pH 7.4): 503.66; (7)ACD/KOC (pH 5.5): 2990.84; (8)ACD/KOC (pH 7.4): 2990.84; (9)#H bond acceptors: 4; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 5; (12)Polar Surface Area: 54.57 Å²; (13)Index of Refraction: 1.553; (14)Molar Refractivity: 77.06 cm³; (15)Molar Volume: 240.7 cm³; (16)Polarizability: 30.54×10^-24cm³; (17)Surface Tension: 46.1 dyne/cm; (18)Density: 1.52 g/cm³; (19)Flash Point: 302.8 °C; (20)Enthalpy of Vaporization: 62.49 kJ/mol; (21)Boiling Point: 399.5 °C at 760 mmHg; (22)Vapour Pressure: 3.14E-06 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: c1(\C(OP(OC)(OC)=O)=C/Cl)c(cc(Cl)c(c1)Cl)Cl
(2)InChI: InChI=1/C10H9Cl4O4P/c1-16-19(15,17-2)18-10(5-11)6-3-8(13)9(14)4-7(6)12/h3-5H,1-2H3/b10-5+ 

The toxicity data is as follows: