Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 109-17-1, Whether you call it Tetraethyleneglycol Dimethacrylate, Polyethylene Glycol (4) Dimethacrylate , PEG-4 Dimethacrylate or TEGDMA you can be assured the Tetraethyleneglycol Dimethacrylate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.