Light Stabilizer 622, its CAS NO. is 65447-77-0. The synonyms are Dimethyl succinate 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol polymer ; Butanedioic acid, 1,4-dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol ; Butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol ; Dimethyl succinate-1-(2-hydroxyethyl)-4-hydroxy-2,2,6,6-tetramethylpiperidine copolymer . 

Physical properties about Light Stabilizer 622 are: (1)ACD/LogP: 2.984; (2)ACD/LogD (pH 5.5): 2.98; (3)ACD/LogD (pH 7.4): 2.98; (4)ACD/BCF (pH 5.5): 108.64; (5)ACD/BCF (pH 7.4): 109.09; (6)ACD/KOC (pH 5.5): 996.42; (7)ACD/KOC (pH 7.4): 1000.58; (8)#H bond acceptors: 3; (9)#H bond donors: 1; (10)#Freely Rotating Bonds: 5; (11)Index of Refraction: 1.547; (12)Molar Refractivity: 59.125 cm³; (13)Molar Volume: 186.454 cm³; (14)Polarizability: 23.439 10-24cm³; (15)Surface Tension: 42.116 dyne/cm; (16)Density: 1.151 g/cm³; (17)Flash Point: 164.156 °C; (18)Enthalpy of Vaporization: 59.214 kJ/mol; (19)Boiling Point: 347.82 °C at 760 mmHg