terephthalic acid molecule. it is benzenedicarboxylic acid, precursor to the polyester pet. structural chemical formula on the

terephthalic acid polyester benzenedicarboxylic unit polymer pet white dark blue plastic precursor terephthalate monomer macromolecule repeat chain building synthetic fiber polyethylene pete ester bottle phthalate drawing flat icon hydrogen carbon oxygen organic chemistry structural formula chemical atomic molecule molecular structure atom compound design vector