The current FTIR evidence does not support a firm identification of the sample as Vinyl chloride/vinyl acetate copolymer, despite that library entry being the nearest nominal match. All listed library similarities are effectively zero, and no direct or related literature evidence narrows the assignment. The observed spectrum is more safely described as an oxygenated aliphatic organic material showing O-H, aliphatic C-H, C-O, and a possible C=C-related band, with uncertainty about whether the sample is a small molecule, additive-rich residue, or polymeric material