octamethylcyclotetrasiloxane molecular structure 3d, flat model, d4 silicone, structural chemical formula view from a microscope

octamethylcyclotetrasiloxane cyclomethicone silicone molecule molecular structure chemical formula model c8h24o4si4 atom silicon compound composition cosmetic gloss liquid pollution risk health skeletal environment viscous chemistry atomic icon line laboratory organosilicon siloxane science bioaccumulation bioaccumulative cyclotetrasiloxane pervasive tetrasiloxane medical medicine research lab octamethylcyclitetrasiloxane ring scientific flat structural view from microscope microscope